TimeOwner D21 Sport Bluetooth Smart Band Wrist Bracelet Support Green Light Static Heart Rate Monitor; Pedometer ; Distance Interface: Colories Display; Palming Bright Screen; Incoming Call Vibration Reminder; Alarm ; Sedentary ; SMS Reminder(For Android). Bind the item in the App "Hplus Watch". Don't connect it with your phone by Bluetooth directly; Monitor your activity levels, track walking distance and calculate calories burned. Achieve the daily exercise targets you set and work towards a healthier lifestyle. The other apps is not compatible with this product; Syncs via Bluetooth with iOS and Android. A Real IP66 Waterproof item, You Can Wear It When you Swimming. Touch the key on the screen to switch functions. Long press the key to activate the functions. For example, to monitor your heart rate, we need to switch to the heart rate icon, then long press the key. When the heart rate button blinks it will monitor your heart rate. Built-in 80mAH Polymer lithium, standby 120 hours after charging 30 minutes Green Light Static Heart Rete Senor, Display the Exact Heart Rate at Any Time you want. Light Weight, easy to operate, 0.66 inch OLED screen for information watching