KOSPET TANK M4 Smartwatch IP69k Dustproof and Waterproof

KOSPET TANK M4 Smartwatch — Rugged Power, Precision Tracking, and Deep Dive Performance

Built for those who push limits, the KOSPET TANK M4 Smartwatch is the ultimate fusion of power, endurance, and intelligence. Whether you’re exploring the ocean depths, training on rugged terrain, or navigating remote landscapes, the TANK M4 is engineered to perform in the most demanding environments. With 10 ATM and IP69K water resistance, this military-grade smartwatch is ready for deep diving up to 45 meters, making it ideal for swimming, snorkeling, scuba, and freediving.

Crafted from SGS-certified Inox 360 stainless steel, the TANK M4 boasts a sleek yet durable exterior that can withstand extreme pressure, dust, and temperature variations. Its 1.96-inch AMOLED display with Corning® Gorilla® Glass 3 delivers exceptional clarity and brightness, reaching 1000 nits peak brightness with automatic adjustment for outdoor visibility. Every detail remains sharp, vibrant, and easy to read even under direct sunlight, ensuring you stay connected wherever your adventures take you.

Powered by an advanced dual-band, six-system GNSS (supporting GPS, Galileo, GLONASS, BeiDou, QZSS, and NavIC), the KOSPET TANK M4 offers pinpoint location accuracy across continents and oceans. Whether you’re hiking through mountain trails or mapping diving routes underwater, the integrated offline maps and real-time navigation keep you confidently on course — even without an internet connection. For explorers, this smartwatch includes route recording, deviation reminders, route-back guidance, and saveable location points, turning your wrist into a personal navigation hub.

What truly sets the TANK M4 apart is its three professional dive modes — Freedive, Scuba, and Gauge — making it one of the most capable underwater smartwatches in its class. These modes track dive depth, water temperature, dive duration, and ascent rates with high precision, helping divers monitor performance and safety in real time. Whether you’re a recreational diver or a professional, the TANK M4 ensures every underwater session is safer and smarter.

Under the hood, the 500mAh pure cobalt battery delivers exceptional endurance, offering up to 15 days of typical use, 10 days with heavy usage, and an impressive 21–22 hours with continuous GPS tracking. When it’s time to recharge, the magnetic charging dock restores full power in just 2 hours, ensuring you’re always ready for your next adventure.

The smartwatch is powered by ApexMotion Sports Engine, featuring 23 advanced sports modes and 160 freestyle training options. It automatically recognizes your workouts, tracks calories, distance, pace, and cadence, and offers personalized training plans to help you improve over time. Whether you’re running, cycling, or swimming, the KOSPET TANK M4 adapts to your movements and training intensity for accurate performance insights.

Health and wellness are central to the TANK M4 experience. Equipped with the VC9213-4PD health sensor and 6-axis gyroscope, it continuously monitors your heart rate, blood oxygen (SpO₂), stress levels, mood, and sleep quality with precision. With 24-hour health tracking, sleep stage analysis (including REM), breathing exercises, and menstrual cycle monitoring, this smartwatch keeps your physical and mental well-being in check. It even sends alerts for abnormal heart rates or low blood oxygen levels, providing proactive health awareness throughout the day.

The KOSPET TANK M4 is not just about fitness — it’s a complete lifestyle companion. It supports Bluetooth 5.3 connectivity for stable pairing, walkie-talkie communication for quick team coordination, and smart notifications for calls, messages, and app alerts. You can control music playback, access your calendar, camera, and calculator, or even send quick replies (on Android devices). Its voice assistant and emergency SOS feature make daily use seamless and secure.

For outdoor explorers, the TANK M4 integrates essential survival tools like a barometric altimeter, compass, geomagnetic sensor, temperature monitor, and extreme weather alerts. It even displays moon phases, tides, sunrise, and sunset times, ensuring you’re always in sync with nature. The flashlight mode and water ejection system further enhance its utility in extreme conditions.

Designed with comfort in mind, the watch includes quick-release 22mm liquid silicone straps for a secure fit on any wrist size (150–240mm). At just 80 grams, it offers a solid yet comfortable feel for all-day wear. The Apexmove App, available for Android and iOS, allows you to sync data, customize watch faces, and connect with fitness platforms like Apple Health and Strava, helping you stay on top of your goals with precision analytics.

Whether you’re an athlete, diver, or adventurer, the KOSPET TANK M4 Smartwatch is your ultimate tool for performance, durability, and exploration. It’s not just a watch — it’s a mission-ready companion designed to go where few smartwatches dare to follow.

Key Features Built for Endurance and Exploration

The KOSPET TANK M4 is equipped with everything you need for extreme environments and daily wellness:

• Extreme Water Resistance: With 10 ATM & IP69K water resistance, this watch is designed for serious water exposure. It includes three dedicated dive modes: 45m Freediving, Scuba, and Gauge Dive, making it an essential tool for underwater exploration.
• Precision Navigation: Never lose your way with Dual-band, six-system GNSS support (GPS, Galileo, GLONASS, BeiDou, QZSS, and NavIC). This multi-system capability ensures highly accurate and reliable tracking of your routes and distances, even in challenging terrain.
• Vibrant AMOLED Display: View your stats clearly on the expansive 1.96″ AMOLED display. It features a sharp 410 x 502 resolution and a peak brightness of 1000 nits, protected by tough Corning® Gorilla® Glass 3. The auto-brightness and Always-On Display (AOD) mode ensure visibility and convenience at all times.
• Outdoor Safety Toolkit: The M4 includes a built-in Walkie-talkie function for secure communication and Offline Maps for navigation when cell service fails. You also benefit from a Geomagnetic Sensor, Barometric Altimeter, and Compass.
• Marathon Battery Life: Powered by a large 500mAh Pure Cobalt Battery, the M4 is built for the long haul. You can expect up to 15 days of battery life under a typical usage scenario, or up to 22 hours of continuous GPS tracking, ensuring it keeps up with your most extended adventures.
• Holistic Health & Fitness: The watch continuously monitors your Heart Rate, Blood Oxygen (SpO₂), Stress Level, and Mood using the advanced VC9213-4PD sensor. It supports 160 Freestyle Training Modes and specialized tracking for swimming and running, and syncs health data with Apple Health & Strava.

Introduction to the KOSPET TANK M4: A Smartwatch Designed for the Demanding Explorer

The KOSPET TANK M4 Smartwatch is not just another rugged wearable—it’s a tactical-grade tool designed for individuals who operate in extreme environments and require a device that can keep up with their pace. Whether you’re diving into the depths of the ocean, navigating remote trails, or training for elite-level performance, the TANK M4 is built to endure and perform. It merges military-grade toughness with intelligent features that support both adventure and wellness. With a design that meets MIL-STD-810H standards and a feature set that includes offline maps, walkie-talkie communication, and over 160 training modes, the TANK M4 is more than a smartwatch—it’s a mission-ready companion.

Military-Grade Build and SGS-Certified Durability

The KOSPET TANK M4 is crafted from Inox 360 stainless steel, a premium-grade alloy known for its corrosion resistance and structural integrity. This material is used in aerospace and marine engineering, making it ideal for harsh environments. The smartwatch is SGS-certified to MIL-STD-810H, meaning it has passed rigorous testing for shock, vibration, humidity, and extreme temperatures. It can operate in conditions ranging from -40°C to 70°C, ensuring reliability whether you’re in the desert or the Himalayas.

Its dimensions—56mm x 44mm x 12.5mm—offer a bold yet wearable profile, and the watch weighs approximately 75 grams, striking a balance between ruggedness and comfort. The casing includes two physical buttons for tactile control during wet or gloved use, enhancing usability in demanding scenarios. The reverse side houses the advanced health sensors and magnetic charging interface, all sealed for water resistance.

Extreme Water Resistance and Dedicated Dive Modes

The KOSPET TANK M4 is rated 10ATM and IP69K, making it one of the most water-resistant smartwatches available. It can withstand water pressure equivalent to a depth of 100 meters, making it suitable for freediving up to 45 meters, scuba diving, and gauge diving. These dive modes include metrics such as depth tracking, dive time, ascent and descent rates, and surface interval monitoring, providing essential data for underwater exploration.

Whether you’re snorkeling in Saint Martin’s Island or training for rescue operations, the TANK M4 delivers the performance and reliability needed for serious aquatic activities. Its waterproofing also protects against high-pressure water jets, making it suitable for industrial and marine environments. The watch’s dive interface is intuitive and easy to read underwater, with large fonts and high contrast visuals that ensure visibility even in low-light conditions.

Precision Navigation with Dual-Band GNSS

Navigation is a cornerstone of the KOSPET TANK M4, thanks to its dual-band GNSS support. The watch connects to GPS, Galileo, GLONASS, BeiDou, QZSS, and NavIC, offering multi-system satellite tracking for unmatched accuracy. This ensures reliable location data whether you’re navigating urban canyons, dense forests, or mountainous terrain. The watch supports route planning, breadcrumb navigation, and waypoint marking, allowing users to explore confidently and retrace their steps when needed.

Combined with offline maps, the TANK M4 ensures that you’re never lost—even when cell service fails. The GNSS antenna is optimized for fast signal acquisition and stable tracking, even in challenging environments like dense foliage or deep valleys. This makes the TANK M4 an essential tool for hikers, climbers, and outdoor professionals who rely on precise navigation.

Expansive AMOLED Display with Gorilla Glass Protection

The 1.96-inch AMOLED display on the TANK M4 delivers stunning visuals with a 410 x 502 resolution and high pixel density, ensuring crisp text, vibrant colors, and deep contrast. With a peak brightness of 1000 nits, the screen remains visible even under direct sunlight—perfect for outdoor use. Protected by Corning Gorilla Glass 3, the display resists scratches and impact, ensuring long-term durability.

The watch supports auto-brightness adjustment and Always-On Display (AOD) mode, allowing users to view time and essential stats without waking the screen. The interface is customizable with dynamic watch faces that reflect your style and activity. The touch response is smooth and accurate, making navigation through menus and apps effortless. Whether you’re checking dive metrics underwater or reviewing your route on a mountain trail, the display delivers clarity and reliability.

Outdoor Safety Toolkit for Real-Time Awareness

The KOSPET TANK M4 includes a suite of tools designed for outdoor safety and performance. These include a built-in walkie-talkie function for secure communication between devices, ideal for group expeditions and emergency coordination. The offline maps feature allows users to download and navigate routes without a mobile connection, providing peace of mind in remote areas. Additional sensors include a geomagnetic sensor for directional accuracy, a barometric altimeter for elevation tracking, and a compass for navigation.

These tools provide critical data for climbers, hikers, and outdoor professionals, helping them make informed decisions in dynamic environments. The watch also includes a flashlight mode, which can be useful during nighttime activities or emergencies. With these tools at your fingertips, you’re always prepared for the unexpected.

Marathon Battery Life with Pure Cobalt Technology

The KOSPET TANK M4 is powered by a 500mAh Pure Cobalt Battery, offering superior energy density and longevity. Under typical usage, the watch lasts up to 15 days, while heavy usage yields 8 to 10 days. Even with continuous GPS tracking, it delivers 22 hours of performance, making it ideal for ultramarathons, expeditions, or multi-day treks. Charging is handled via a magnetic cable, with a full charge taking approximately 1.5 hours.

The battery supports Power Saver Mode, which extends life during emergencies or travel. The cobalt composition ensures stable performance across hundreds of charge cycles, making the TANK M4 a reliable long-term investment. The battery management system intelligently balances power consumption across sensors and display, ensuring that the watch remains responsive and efficient throughout your journey.

Holistic Health and Fitness Tracking

The KOSPET TANK M4 includes the advanced VC9213-4PD sensor, offering continuous health tracking. It monitors heart rate, blood oxygen (SpO₂), stress levels, and mood, providing real-time insights into your well-being. Sleep tracking includes sleep score, duration, and quality analysis, promoting better recovery and wellness. The watch supports 160 freestyle training modes, including specialized tracking for swimming, running, cycling, and strength training.

It syncs health data with Apple Health and Strava, enabling users to analyze performance and share progress across platforms. Smart recognition automatically detects several activities, simplifying tracking and data collection. The health dashboard is accessible directly from the watch, offering quick insights and historical trends that help users stay informed and motivated.

Smart Features and Seamless Connectivity

The KOSPET TANK M4 supports Bluetooth 5.3, ensuring stable connections with smartphones and other devices. It includes 256MB NOR Flash memory, allowing for smooth operation and quick access to apps and data. The interface is intuitive, with touchscreen navigation, physical buttons, and voice prompts. Notifications, calls, and messages are accessible directly from the wrist, keeping users connected without reaching for their phone. The watch also supports music control, camera shutter, and find-my-phone features, enhancing convenience during workouts and travel.

With its smart features and robust connectivity, the TANK M4 bridges the gap between rugged performance and modern convenience. The watch is compatible with both Android and iOS, and integrates seamlessly with the KOSPET Fit app for customization, data syncing, and firmware updates.

Who Should Choose the KOSPET TANK M4

The KOSPET TANK M4 is ideal for outdoor adventurers, athletes, military personnel, and remote workers. Its rugged build, waterproofing, and navigation tools make it perfect for hiking, diving, and climbing. The sports tracking and health monitoring features support training and recovery, while the MIL-STD-810H certification and walkie-talkie function make it suitable for field operations. The offline maps, long battery life, and smart connectivity ensure productivity and safety on the move.

Whether you’re exploring the wilderness or navigating the urban jungle, the TANK M4 is built to support your journey. It’s a smartwatch that doesn’t just survive the elements—it thrives in them.

Specifications:

Display:

• 1.96-inch AMOLED
• 410 × 502 Pixels
• 331 PPI
• Up to 1000 nits
• Corning Gorilla Glass 3
• Auto-Brightness
• Raise to Wake

Battery & Charging:

• Capacity: 500mAh
• Battery Type: Pure Cobalt
• Up to 9-10 Days (Heavy Use)
• Up to 14-15 Days (Typical Use)
• Up to 5-6 Days (AOD)
• Up to 21-22 Hrs (Continuous GPS)
• Charging Time: Up to 2H
• Charging Type: Magnetic Charging Dock

Sensors:

• Health: VC9213-4PD Sensor
• Movement: 6-axis Gyroscope
• Positioning: Dual-band GNSS (GPS, Galileo, GLONASS, BeiDou, QZSS, NavIC)
• Environmental: Geomagnetic Sensor, Barometric Altimeter, Ambient Light Sensor, Temperature Sensor

Health & Fitness Tracking:

• Heart Rate Monitoring
• Blood Oxygen (SpO2)
• Sleep Stages (including REM)
• Sleep Tracking
• Menstrual Cycle Tracking
• Breathing Exercise

Built Quality:

• Body Material: Inox 360 Stainless Steel
• Case Back Material: Stainless Steel
• Strap Material: Liquid Silicone
• Strap Size: 22 mm (Quick Release)
• Wrist Fit: 150 – 240 mm
• Buttons: 4
• Water Resistance: Up to 10 ATM & IP69K

Storage:

• 32 GB ROM
• 16 MB SRAM (Memory)

Connectivity:

• Bluetooth: Bluetooth 5.3
• Microphone: Yes
• Speaker: Yes
• App Compatibility: Apexmove App
• Third-Party App Compatibility: Syncs with Apple Health & Strava
• Compatibility: Android 7.0 and above, iOS 14.0 and above

Functions:

• Auto-Brightness
• AOD
• Raise to Wake
• Specialized Dive Modes
• Activity Tracking
• Notifications
• GPS
• Control Music & Camera
• Find Phone
• Alarm Clock
• Timer
• Emergency SOS
• Sedentary Reminder
• Do Not Disturb
• Water Ejection
• Screen Lock & Password
• Stopwatch
• Calculator
• Calendar
• Weather
• World Clock
• Voice Assistant
• 160 Freestyle Training Modes

Why Buy KOSPET TANK M4 in Bangladesh

The KOSPET TANK M4 price in Bangladesh is Tk 15,490, making it a highly competitive choice for adventure-ready smartwatches. It offers military-grade durability, extensive sports tracking, real-time navigation, and health monitoring, all in one device.

Available through Gadget Studio BD, the smartwatch is perfect for athletes, explorers, and tech enthusiasts who demand both ruggedness and intelligence in their wearable technology.

Final Verdict: Why the KOSPET TANK M4 Is the Ultimate Smartwatch for Explorers

The KOSPET TANK M4 Smartwatch is a fusion of military-grade resilience, intelligent health tracking, and outdoor-ready features. With dual-band GNSS, offline maps, walkie-talkie communication, and a 500mAh battery, it’s built for users who live life on the edge. Whether you’re an athlete, diver, mountaineer, or tech-savvy professional, the TANK M4 delivers the tools and toughness to match your ambition. Its expansive AMOLED display, extreme waterproofing, and precision navigation make it a standout in the rugged smartwatch category. Available now in Bangladesh, the KOSPET TANK M4 is a smart investment for anyone seeking a smartwatch that combines precision, power, and performance in one sleek, durable package.

Whether you’re deep underwater, scaling mountains, or tracking your health and training progress, the TANK M4 delivers precision, reliability, and convenience at an exceptional value. With a price of Tk 15,490 in Bangladesh, it combines rugged endurance with smart functionality, making it an indispensable tool for serious adventurers.

FAQs

1. What makes the KOSPET TANK M4 Smartwatch unique compared to other rugged watches?

The KOSPET TANK M4 stands out for its combination of rugged durability, dive-grade waterproofing, and precision tracking. With 10 ATM and IP69K water resistance, it’s built for deep-sea diving and extreme environments. Its dual-band GNSS system, offline maps, and stainless steel construction make it ideal for professional adventurers, divers, and athletes who demand performance and endurance in one smart device.

2. How deep can I dive with the KOSPET TANK M4 Smartwatch?

The KOSPET TANK M4 supports diving depths up to 45 meters, making it perfect for freediving, scuba diving, and gauge mode tracking. It automatically detects water pressure changes and provides accurate readings of depth, duration, and ascent speed, ensuring safe underwater exploration. Its 10 ATM water resistance and IP69K protection ensure reliability even under intense pressure and salty conditions.

3. What is the battery life of the KOSPET TANK M4?

The smartwatch houses a 500mAh pure cobalt battery that delivers impressive longevity — up to 15 days under typical use, 10 days with heavy use, and 21–22 hours of continuous GPS tracking. Even with the always-on display (AOD) feature, it lasts 5–6 days. Recharging is fast and effortless with the magnetic charging dock, fully powering up in about 2 hours.

4. Does the KOSPET TANK M4 Smartwatch support offline maps and GPS navigation?

Yes, the KOSPET TANK M4 features offline maps and real-time GPS navigation, powered by its dual-band six-system GNSS technology, which includes GPS, Galileo, GLONASS, BeiDou, QZSS, and NavIC. This ensures pinpoint accuracy even in remote areas. It can record routes, provide deviation reminders, and guide you back with the route-back function, making it a reliable companion for hikers, travelers, and divers.

5. How durable is the build of the KOSPET TANK M4?

The TANK M4 is built using Inox 360 stainless steel, certified by SGS for its toughness and corrosion resistance. The screen is protected with Corning® Gorilla® Glass 3, making it scratch-resistant and impact-proof. This robust construction ensures the watch can handle shock, dust, mud, extreme heat, and pressure, making it suitable for professional outdoor use and tactical activities.

6. What display quality does the KOSPET TANK M4 offer?

It features a 1.96-inch AMOLED display with a sharp 410 × 502 resolution, delivering crisp and vibrant visuals. The screen has a 331 PPI pixel density and 1000 nits peak brightness, making it visible even in direct sunlight. The auto-brightness sensor adjusts the illumination based on your surroundings, ensuring optimal readability indoors and outdoors.

7. Can the KOSPET TANK M4 monitor my health and fitness activities?

Absolutely. The KOSPET TANK M4 offers 24-hour health monitoring, tracking heart rate, blood oxygen (SpO₂), stress level, mood, and sleep stages in real time. It uses a VC9213-4PD sensor for medical-grade accuracy. You can also use one-tap measurement to instantly check multiple metrics, and features like menstrual cycle tracking, breathing exercises, and abnormal heart rate alerts provide complete wellness management.

8. How many sports modes does the KOSPET TANK M4 include?

The smartwatch supports an impressive 160 freestyle training modes and 23 ApexMotion sports activities, covering running, swimming, cycling, climbing, yoga, and more. It also features automatic workout recognition, personalized training plans, and performance analysis tools. With real-time data on distance, pace, calories, and heart rate zones, the TANK M4 helps you train smarter and perform better.

9. Is the KOSPET TANK M4 compatible with my smartphone?

Yes, it’s fully compatible with Android 7.0 and above and iOS 14.0 and above. The Apexmove App, available on both Google Play and the App Store, lets you sync your fitness data, customize watch faces, and connect with third-party fitness platforms like Apple Health and Strava for a unified tracking experience.

10. What smart features are available on the KOSPET TANK M4?

The KOSPET TANK M4 is a complete smart companion. It includes Bluetooth 5.3 connectivity, walkie-talkie communication, voice assistant, music and camera control, message and call notifications, emergency SOS, and quick replies (Android only). You’ll also find handy daily tools like a world clock, calculator, timer, stopwatch, and weather alerts, making it perfect for everyday use.

11. Is the KOSPET TANK M4 suitable for outdoor adventures and extreme sports?

Definitely. The smartwatch includes barometric altimeter, geomagnetic sensor, compass, and ambient light and temperature sensors, all designed to assist outdoor explorers. It displays sunrise/sunset times, moon phases, tides, and extreme weather alerts, helping you plan your activities safely. With features like a flashlight and water ejection mode, the TANK M4 is an indispensable tool for adventurers.

12. What colors and materials are available for the KOSPET TANK M4?

The smartwatch comes in Black and Silver, both featuring stainless steel body and case back with a liquid silicone strap for comfort and durability. The 22mm quick-release straps make it easy to switch styles. Weighing just 80 grams, the KOSPET TANK M4 combines a solid, premium feel with long-lasting comfort for daily wear or extended expeditions.

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