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.Waterproof : IP65<br />10.Bluetooth version: Bluetooth 4.0<br />11.Support System:Android phone(Android 4.3 or above and bluetooth 4.0)｣ｬ and iPhone (iOS 8.0 or above and bluetooth 4.0)<br />The main function:<br />Step count｣ｬ distance｣ｬ calorie consumption<br />Time display｣ｬ <br />Smart alarm clock｣ｬ smart unlock<br />Firmware Upgrade<br />Sedentary reminder<br />Motion Tracking<br /><br />Precautions:<br />This product contains magnetic parts｣ｬ has installed a pacemaker or implanted electronic devices or metal objects｣ｬ please do not use this product.<br />When such wear｣ｬ symptoms appear｣ｬ please stop using the product immediately.<br />If you use sub-standard power charging will shorten battery life｣ｬ and even damage the battery.<br />Our bracelet sealed process｣ｬ anti-sweat｣ｬ to meet the daily water｣ｬ such as hand ｣ｬ etc.｣ｬ but does not support swimming｣ｬ diving grade waterproof.<br /> <br />Package include: <br />1 * Bracelet <br />1 * Charging Cable<br />1 * U