The loudest and clearest way to take cell phone calls on your boat or vehicle, the BT 200 features Cobra's MicroBlue technology for receiving calls from Bluetooth capable mobile phones in a unique noise cancelling handset. The powerful speaker ensures that calls are clearly heard. Installation is simple with easy one-time configuration, the same as a Bluetooth headset. 12-volt DC plug provides easy power hook-up. Features EasyGrip microphone, large dot matrix display, caller ID, one-touch redial, call log, 50 number phone book, easy volume adjust, and selectable ring tones. Can be paired with up to 8 different mobile phones. 4.5"H x 2.6"W x 1.4"D. Not a substitute for a marine VHF radio.