Jozabova TW64 Smart Watch Bluetooth Watch Bracelet Smart band 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 connect .(Download dedicated APP.) Love life walking from now on: TW64 will record your step,distance and calorie,which can help you to set the target. 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+) Plesse put your hand at 90 degree, the lcd will show the digital automatically.