Unlike traditional handsfree car phone devices that require a corded earpiece, this wireless speakerphone unit provides the highest quality hands-free audio using the world-standard Bluetooth wireless connection, and it produces sound more powerful than the weak speakerphones built into many cellular phones. When connected to a Bluetooth-enabled phone, this portable device lets you carry on crystal-clear conversations and boardroom-type group conference calls in the car, at home, or at the office without removing your hands from the steering wheel or other tasks at hand. Full duplex audio technology allows both parties to speak at once, and the system has echo-and noise-reduction filters. The Bluetooth connection allows the unit to roam up to 30' from the phone, and a high-capacity, built-in rechargeable battery provides up to five hours of talk time. Has a vehicle power adapter and a visor clip. 3 1/2" H x 2" W x 1" L. (2 oz.)