X-Strong&reg; Bluetooth 4.0 Smart Watch Fitness Activity Tracker Smartband Wristband TW64 Intelligent Bracelet Pedometer Anti-lost for IOS Android (Black) Compatible with: ios 6.1+ version, Android 4.3+ version Your healthy monitor: Help you keep a good habit, health and happiness follow you. TW64 will record your step, distance and calorie, which can help you to set the target Sleep Monitor: 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. Function description: Step counts, Distance measuring, Calorie Consumption management, Sleep management, Event trigger (water drinking, taking medicine, meeting etc), call reminder, message reminder, clock, sedentary reminder, anti- lost (positive and negative direction lookup), remote camera, vibration alarm clock