Seamless Bluetooth Control for Your Audio System! The MB Quart Nautic bluetooth controller is simple source unit solution designed to mount in a standard switch or accesory location. Features include: Back lighting and RCA outputs (Left & Right). Specifications: Series: Nautic Color: Black Warranty: 1 Year Marine Grade Protection / IPX Rating: Meets or exceeds the American Society for Testing and Materials (ASTM) standards. Source Unit Bluetooth Range (ft): 32 Source Unit Frequency Response (Aux In): 20Hz-20kHz Source Unit Pre-amp Outputs (Y/N #): 1pr Left/Right, Yes Source Unit Pre-amp Voltage: 2.0V Source Unit Display Type: Backlight Source Unit Display Backlit: Dial is backlit Source Unit Dimensions Mounting Hole (in): 0.83 x 1.41 Source Unit Dimensions Total Mounting Depth (in): 2.5 Source Unit Dimensions Mounting Bezel (Round) (in): 4.15 Source Type: Allows music via Bluetooth enabled devices. Input Types: Bluetooth enabled devices and 3.5mm input from headphone output of mobile music device or phone. Control Buttons: 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: Bluetooth Connect allows your phone or other Bluetooth enabled device to be quickly paired to the controller without a complicated pairing process. Additional Inputs: 1 pair RCA (Left & Right)