TimeOwner D21 Sport Bluetooth Smart Band Wrist Bracelet Support Green Light Static Heart Rate Monitor; Pedometer ; Distance Interface: Calories Display; Palming Bright Screen; Incoming Call Vibration Reminder; Alarm ; Sedentary ; SMS Reminder(For Android). Monitor your activity levels, track walking distance and calculate calories burned. Achieve the daily exercise targets you set and work towards a healthier lifestyle! Only Honest Policy and Amazon.com have Brand Licensing of TimeOwner Shows 24 HR military time. Follow the steps in the pictures, you can use this product better If data not sync to the App, please delete the device in the App and add the App to the white-list. Then rebind the device in the App. Built-in 80mAH Polymer lithium, standby 120 hours after charging 30 minutes a. Charge the fitness tracker for 1 hour when receiving the package; b. Install the App on the Phone, and add it to the white-list to make sure it could run in the background (very important); c. Bind the fitness tracker in the App.