Vahulawa Fitness Tracker TW64 Smart Watch Bluetooth Watch Bracelet Calorie Counter Wireless Pedometer Sport Activity Tracker for iPhone Samsung Android iOS Phone (Yellow) Please NOTE This wireless smart sports watch is the one must be used with Mobile phone and dedicated APP. Love life walking from now on: TW64 will record your step,distance and calorie,which can help you to set the target. resistance and waterproof. Function description: Step counts, Distance measuring, Calorie Consumption management, Sleep management, Event trigger (water drinking, taking medicine, meeting etc), call reminder, clock, sedentary reminder, anti- lost (positive and negative direction lookup), remote camera, vibration alarm clock. For Android / Iphone Smartphones, it can support all the function in the description. Compatible with: Android 4.4 or above, IOS 7.1 or above (such as iPhone 4S, iPhone 5, 5C, 5S, 6, 6+) At some certain degree, the lcd will show the digital automatically. Please recognize the seller name ''Vahulawa' beware of imitation, fake and poor products from other seller