Cobra MR F300BT Waterproof Marine Handset with Bluetooth Wireless Technology for Use with Bluetooth-Enabled Cell Phones Waterproof Bluetooth handset pairs with up to eight separate cell phones, connects directly to boat's 12V DC power system Phone-friendly features include 50 number call log, 50 contact phone book, caller ID, selectable ringtones Noise-canceling microphone for crystal-free communication, incoming audio sent over unit's speaker or to stereo AUX input Large illuminated dot matrix display and backlit blue buttons; adjustable backlight for low-light conditions New Music Mode lets you wirelessly stream and control music from your compatible iPhone, iPod Touch, Blackberry, or Android phone