MB Quart N2-Wbt Nautic Mounted Preamp Controller The MB Quart Nautic Bluetooth notable features include backlighting and RCA outputs for both the left and right channels. The controller is a straightforward source unit solution specifically designed to be mounted in a standard switch or accessory location. Features: Meets or exceeds the American Society for Testing and Materials (Astm) standards Bluetooth enabled devices and 3.5mm input from headphone output of mobile music device or phone Fingertip Joystick: Play/Pause, Tracks Forward/Back, Volume Up/Down and Power On/Off are all protected from the elements with the the unique Fingertip Joystick Bluetooth Connect allows your phone or other Bluetooth enabled device to be quickly paired to the controller without a complicated pairing process 1 pair RCA (Left & Right) Specifications: Frequency Response (Aux In): 20Hz-20kHz Pre-amp outputs (Y/N #) 1pr Left/Right, Yes Pre-amp voltage: 2.0V Display Type: backlight Dimensions Mounting Hole (in) 0.83 x 1.41 Dimensions Total Mounting Depth (in) 2.5 Dimensions Mounting Bezel (Round) (in) 4.15