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Smartwatch on your wrist acts as your personal assistant allowing you to focus on every day health data while you are busy with work at your office or studies. M4 Smart Bracelet Heart Rate Monitor Blood Pressure Sport Bracelet Fitness Tracker Band Bluetooth Smart Band for Android IOS M4 specification: Bat battery capacity: 60 MAH; Waiting time: 15 days Material: silica gel Adjustable length: 160 245mm Display: 0.42 inch screen Operation of the OLED screen: Curved touch Motion sensor: acceleration by gravity of three axes NORDIC sensor: 51822 Water resistant: IP67 Operating temperature: 20 60 Bluetooth: compatible bluetooyh4.0 (Android and IOS) Charger: Suction charger Deployment function: Blood pressure: simulate blood pressure, oxygen and heart rate Sports plan: training plan Time: 24 formula OLED screen Pedometers: Movement step CALL ALERT: impact (incoming SMS calls Wechat qect.) Sleep control: monitor sleep quality Alarm warning: configure the application Low voltage reminder: Vibration reminder