SUBA TW64s Smart Bracelet, Sports, fitness, Bluetooth Smart Watch, Selfie Photo, Activity Tracker, Healthy Wristband, Pedometer, Sleep Monitor, IOS Android, Heart Monitor, Waterproof (Black) Alarm alert, call alert, sedentary alert, etc. by silent vibration. Device could automatically recognize your status and monitoring the whole sleep progress with analyzing the deep sleep and light sleep hours. Monitoring your heart rate effectively, and being reasonable to planning the move. Record daily activities, you could check daily activities including steps, distance and calorie consumption in the app. When the smart phone is beyond the Bluetooth range (No more than 5m), the device vibrates to remind, Device key could control remote photograph shooting.