Specifications: 1) Voice dialing function to support your mobile phone 2) Phone call receiving and interrupting function to support your mobile phone 3) Sound effect: clear and sound volume can be adjustable 4) Longest standby time: 120 hours 5) Communication range: 10 meters 6) Longest talk time: 3 hours 7) Can be worn comfortably on either ear, allowing you to be hands-free and cord-free all day long