Perfect Smartphone Companion IP67 Dust & Waterproof Support for short immersion into water, & daily water resistant. Just waer it enjoy your sports time. USB (Universal Serial Bus) Quick Charge Anytime, anywhere, no need extra cable. Sports Tracking The waterproof sports bracelet only record the activity time, steps, distance, calories consumption etc, but also can monitor sleep, fitness tracking. Smart Reminder Built-in bluetooth 4.0 technology, the smart bracelet can vibrate to reminder of Incoming calls, SMS, Skype, Facebook etc. & sedentary reminder, you can set the sedentary reminder time for exercise. Auto Screen Light When turn the smart bracelet towards you, just like watch a normal watch, then angle between 30