Meya Happy Fitness Bands M3 Smart Band Fitness Tracker Watch Heart Rate Band with Activity Tracker Waterproof Body Functions Like Steps Counter, Calorie Counter, Blood Pressure, Heart Rate Monitor OLED Touchscreen (M3) Colour:M3   M3 Fitness Smart band: If you're a fitness freak and love keeping a track of the calories burnt, sleep cycle, and heart rate, and then the M3 Smart Band is what you need. This smart band works as a heart rate tracker, fitness watch, and an activity tracker.M3 waterproof Smart fitness Band compatible with Bluetooth or Heart Rate Sensor. It is compatible to devices having Bluetooth version 4.0 and below in smartphones, Tablets and PC's and also support Android and IOS. Functions: 1.Heart Rate Monitor 2.Sedentary reminder 3.Calories 4.Time 5.Alarm 6.Anti-lost 7.Distance calculation 8.Step Monitor 10.Call Alert 11.Wrist sense Pre-requisites for use: Your mobile phone Bluetooth version must be Bluetooth 4.0 or higher, IOS version must be iOS 7.1 or above, Android version must be Android 4.3 or above. Working: To connect the smart band to mobile phone, you need to connect the current mobile successfully via Bluetooth. Click unbind icon and band has been successfully connected with the device. Specifications HR sensor: Silicon labs Si1142 Host weight : 7g Battery type : rechargeable Li battery , Battery capacity :40mAh. Note: To charge this fitness band you simply need to connect it with the charger charging will get start automatically . Data sync: Bluetooth 4.0 Working temperature: -10c to 50c Waterproof: Not for swimming or diving Standby time: 15 days & above this product uses professional Bluetooth RF signal and custom algorithm, the accuracy can reach 100 % and above Package Contents: 1 x Bluetooth Smart Bracelet 1 x User manual 1 x USB Charging cable