Activity Tracker Accurately tracks the steps, heart rate, distance, calories all day. Heart rate detection will be performed automatically, and the bracelet vibrates to indicate the end of the test. Waterproof Designed. You can wear it when washing hands, swimming, diving or getting caught in the rain. If you don't want to wear the tracker, you need to buy a new one. Support Android 4.4 and above, only for smartphones. Click the camera icon of the fitness tracker screen, and enter the remote control camera.