RHONNIUM ™ M2 Fitness Tracker Smart Bracelet Wristband 0.42 Inch OLED Screen IP67 Waterproof Support Heart Rate Monitor for Android IOS Smart Phone(Black Strap, Size : Free Size), Coal

Specification: ●Bluetooth: 4.0 ●APP : ISO 8.0 and above; Android 5.0 and above ●Input Voltage: 5V ●Waterproof: IP67 ●Charge: USB port charging ●Battery: 70mAh Li rechargeable battery ●Standby time: 5-8 days ●screen:0.42 inch OLED With its high precise sensor, you can track your heart rate/blood pressure more accurate, besides with its compact design, you will feel more comfortable when wearing Muti-Functional: ●SMS Alert：Let you never miss a call and message ●Camera Control：Just gently shake, then use this function for selfie or group photos with a better pose for photo sight ●Hear Rate /Blood Pressure Monitor: Easily measure your heart rate and blood pressure at the wrist and warn your healthy ●Sedentary Reminder: Vibrate and display icon when lack activity per period set ●Smart Alarm: Up to 3 alarms with user-friendly vibration. Support offline clock alarming ●Activity Tracker: calculate the step/distance/ calorie Sleep Monitor: when you sleep, it will measure your hour of sleeping and show you sleep quality Kindly Note: 1.Hardware and system of devices should meet: iOS 8.0 or above, Android 5.0 or above and Bluetooth 4.0 or above 2.To monitor heart rate more accurately, please wear the device on the upper position of your wrist and bit tighter than usual when you are taking exercise 3.Please download and install the free App by scanning the QR code in manual