Waterproof: S1 smart bracelet is not afraid of washing hands/ doing housework/ walking under rain, it can be weared to swim or dive(the depth not over 1m, time not over 30mins). The adjustable snap strap would well fit your wrist. 24h Heart Rate Monitor: S1 smart bracelet can accurately monitor your all-day heart rate ,not only your static heart rate, but also could measure your movement heart rate. Multifunctional Wristband: Time, Date, Pedometer, Calorie Burning Monitor, Distance, Sport Mode (Swimming mode, Bicycle-riding mode, Runningmode, Ropeskipping, Sit-ups, Jumping jacks), Sleeping Monitor, Call Reminder, Anti- Lost Feature, Sedentary, Camera Remote. Just a simple but powerful pedometer bracelet The perfect combination of intelligent bracelet and bluetooth headset. It has exercise management and bluetooth phone function, can well adapt with call and exercise.