IZED STYLE - Sporty design with round 1.28" AMOLED touchscreen(support Always-on display). Multi-watch faces to ize your look(support customize watch face by your own image).MULTI-FUNCTIONS - Steps counter and all day activities tracking, Alarms, Drink water and sedentary reminder, Heart rate and sleeping monitor, Music control, Dialy weather, Timer, Customize watch face, Temperature, Compass and etcWATERRESIST - Professional IP68 waterproof and 3ATM design, support rainy outdoor activities and water sports.HEALTH - Automatically tracks daily steps, get calories, sleep and more. 100+ sports modes (walking, running, cycling, swimming...) with heart rate monitor and activity tracker functions to help better understand body condition.STAY CONNECTED - Notifications for calls, texts, apps. Automatic time zone and calendar syncing. Answer and make calls directly on your watch without take out your smartphone.COMPATIBILITY - The B3 compatible with Android 7.0 and above, iOS 12.0 and above smartphones, Download FitCloudPro app from App store or Google play store.BATTERY LIFE - Battery working time 5-7 days, standby 7-10 days.