● 1.28 inch transflective display, large viewing is perfect for outdoor use. ● Ultra lightweight and thin body. Only 31g total weight and 11.4mm thickness for a comfortable wear day night and during sports activities. ● Special wristband cleaning process: stain resistant breathable and smoother touch. ● 4 colors to choose from with quick release straps. ● 5 Built-in Dials (4 editable 1 non-editable and more than 40 dials to download from the watch face store, for a personalized look(pointer dial,digital dial, function dial, iP dial). ● Always-on display: The watch will always display the time and date on the screen anytime, anywhere. ● 40 Days battery life on a single charge to keep up with your busy active lifestyle. Up to 22 hours with the GPS continuously working. ● Low-power consumption transflective display technology. ● 28nm ultra low power consumption Sony GPS chip, consuming only 1/3 power compared to similar GPS chips. ● Huami Self-developed low power consumption Bio Tracker PPG optical sensor Reduces power consumption by 80%. ● With 5 ATM, the watch can resist to any of your daily activity and can even be worn while swimming (up to 50 meters water pressure). ● Corning Gorilla glass and anti-fingerprint coating makes it scratch resistant and easy to keep clean. ● Robust hard 316L stainless steel button with color matching the watch, adding a fashion touch.