Un-Tech M3 Fitness Activity Tracker Band Smart Band Strap  (Black)

M3 Band with charger water proof bluetooth smart fitness band is a 3 in 1 Monitor with a heart rate machine .It is compatible to devices having Bluetooth version 4.0 and below in smart phones, Tablets and PC's and also support Android and IOS.It has features such as calling function which enables you make a call and disconnect it, you can also send and receive messages through it but only supported to android Phones for which you need to download app. Heart Rate & Sleep Monitoring: It learns your activity level including amount of steps, mileage, heart rate, and records calories burned throughout the day, improve your overall wellness today, tomorrow and well into your future Tracks real-time heart rate automatically & continuously and automatically tracks your sleep duration & consistency with comprehensive analysis of sleep quality data, helping you adjust yourself for a healthier lifestyle. Built-in USB Plug: Built-in USB plug makes it easy to charge with any USB block and computer; no charging cable and dock needed; Full charge requires only about 1-2 hours and gives you up to 4 days of working time.Battery Capacity and Battery Type: 90mAh Polymer Rechargeable Lithium How to charge? This fitness tracker has a built-in USB port, please separate the device from strap and and insert the USB charging plug into normal DC USB port (5V-500mA). The "Charging" will be light on while right charging, if not, please check and turn the device's USB charging plug to the correct direction, or try another socket. Warm tips: To ensure the lifespan of the device, please remove the device host from the power supply once fully charged. It takes about 1~2 hours to have the host fully charged