This watch is Bluetooth 3.0. All functions support android 4.3 and up smart phones. But for iphone, it just support answer -amp; call, phone book ,music play, camera, clock, pedometer, Still support SMS, Radio, remote camera control, sleep monitoring, etc.
A1 Sends and receives calls and text messages (only with ANDROID when connected by Bluetooth), step counter, message reminder, world time, 240 x 240 pixel HD screen. You could also Control the camera on your phone, play music through your SmartWatch. Brings a reminder to keep you with an active lifestyle. Notifications on your SmartWatch will you when your phone’s applications need attention (for ANDROID only). A1 has a Speaker that is clear with excellent sound, calculator, sleep monitor and supports Micro SD cards up to 32 MB (SD Card not included). 3 different colors to choose from.