9.4 mm thin and 24.8 g lightweight aluminum alloy case for high wearing comfort and a pleasant look. Large 1.65" 340 PPI AMOLED display for an outstanding and comfortable viewing experience with 7 customizable access icons. This watch is designed to withstand all your activities and is 5 ATM certified, which corresponds to approximately 80 PSI, 164 feet, or 50 meters of water depth.

Track 12 different sports: outdoor running, treadmill, hiking, outdoor/indoor cycling, elliptical trainer, swimming in the pool/open water, mountaineering, trail running, skiing, and training. GPS + GLONASS accurately tracks your routes. Up to 14 days of battery life on a single charge. Up to 25 hours with GPS on.

Huami's self-developed high-precision optical heart rate sensor for manual and continuous heart rate monitoring during workouts. Monitor your sleep and receive an analysis of your sleep behavior. Get notifications for incoming calls, emails, messages, and other applications.