Note:<br />D21 Smart bracelet product details URL:<br />https://www.youtube.com/watch?v=uZtmCWlJZw0<br /><br />Function:<br />Model: DFit D21<br />1.Model: D21 Smart Band<br />2.Memory size: 256k<br />3.Acceleration sensor: triaxial accelerometer<br />4.Strap: medical silicone<br />5.Display: 0.66OLED screen<br />6.Vibration motor: cylindrical vibration motor<br />7.Operation way: touch operation<br />8.Battery Capacity: 80mAh (Standby time will depend on the actual using situation.)<br />9.Standby Time: About 3-5days<br />10.Waterproof : IP65<br />11.Bluetooth version: Bluetooth 4.0<br />12.Rapid brush  BUS・ can be customized set up the city<br />(Built-in NFC chip)<br />13.Support System: Bluetooth 4.0・ Android 4.4 or above 7.0 and IOS system<br /><br />The main function:<br />Heart rate monitor・ caller ID・ text messaging・ micro-channel・ vibration<br />Step count・ distance・ calorie consumption<br />Time display・ sleep monitoring・ camera・ anti-lost reminder<br />Smart alarm clock・ smart unlock<br />Sports information sharing<br />Firmware Upgrade<br />Sedentary reminder<br />Motion Tracking<br /><br />Package include: <br />1 * Bracelet<br />1 * Charging Cable<br />1 * User manual