uPlay Smart Watch W2 - Bluetooth mic and hand-free speaker for iPhone and Android phones Connects to iPhone, Samsung Galaxy phone, HTC, AT&T, T-Mobile, and all other Android Phones with built-in bluetooth, or other bluetooth enabled devices to easily answer phone call, online voice chat or listen to music. Built-in microphone and speakerphone for easy hands-free use (the volume of the speakerphone is not adjustable. Some customers think the volume is too low to use in the noise environment) Caller ID displays caller's phone number. Phone calls can be answered wirelessly from the watch with the press of one button Adjustable wrist band, built-in alarm clock Long press a button to call the last phone number. Double press a button to use the voice control and call phone on iPhone (the voice call function only works on iPhone)