AMOLED screen of 340 and custom Widgets. Large 1.65 'and 340 PPI AMOLED display for an exceptional and more comfortable viewing experience with 7 customizable access icons. Water-resistant up to 5ATM. Designed to support all your activities, this watch is 5 ATM certified, equivalent to approximately 80 PSI or 50 meters deep in the water. 12 sport modes and GPS + GLONASS measurement. 12 different sports: running outdoors, treadmill, walking, outdoor cycling, exercise bike, elliptical, swimming in the pool / open water, hiking, trail running, skiing, and gym. GPS + GLONASS will track your routes accurately. 14 days of battery. Up to 14 days of battery life with a single charge. Up to 25 hours with GPS continuously on BioTracker PPG frequency sensor. The high-precision heart rate optical sensor developed by Huami for manual and continuous monitoring of heart rate during workouts. Sleep measurement Control your sleep and give you an analysis of your sleep patterns. Notifications Receive notifications of incoming calls, emails, messages, and other applications.