Just over 1/2" thick, this is the slimmest Bluetooth speakerphone available. After initiating or answering a call from your Bluetooth-enabled cell phone, the built-in echo cancellation and noise suppression software enable its microphone to capture your voice without error, and its speaker provides clear voice quality so you can place it in a cup holder, clip it to a visor, or set it on your dashboard and still carry on conversations with no crackling. It also has a mute button that allows you to carry on a side conversation while on conference calls. It can pair with up to seven different Bluetooth-enabled devices. Provides up to eight hours of talk time (up to 500 hours of standby time) before requiring a three-hour recharge using the included AC or DC chargers to recharge at home or in your car. Does not support voice dialing. 5" L x 2" W x 3/4" D. (2 3/4 oz.)