SURMOS Smart Sport Bracelet TW64 Smartband Wristband Fitness Tracker Bluetooth 4.0 Time Display Flexible Watch Bracelet (Black) Your healthy monitor:Help you keep a good habit,health and happiness follow you Love life walking from now on:it will record your step, distance and calorie, which can help you to set the target Sleep Monitor:it is able to detect how long you sleep, through its health software, count up your time of deep sleep,light sleep Smart reminder: In-call reminder, sedentary reminder,drinking reminder, wake up alarm etc Living Water-resistant, best for sport