Best Fitness Tracker. Stay with you everywhere and keep a health record of your body. It tracks and manages all your daily bodybuilding activities.The screen will light when you turn over your wrist. Heart Rate Measures records Max/Min rates and average rate. (Manually turn on and off on the device or through the APP). Pedometer: Measures steps, calculates distance walked and calories burned. Sleep Monitor-The smart bracelet monitor your sleep automatically, tracking analyzing sleep quality.