The JBL PRV-175 Digital Media Receiver provides lots of ways to listen to music on your boat without taking up too much dashboard space. The compact design fits into a standard tachometer opening. Listen to AM/FM, or use the built-in Bluetooth to stream music wirelessly from your Android phone. You can also use the rear aux input for your music player or plug a thumb drive into the rear USB port. Features two sets of rear-mounted preamp outputs, easy-to-view LED display, and watertight UV-stable face and controls. 45 watts x 4 output. Faceplate: 4.125" diameter. Cutout: 3.5" diameter. Mounting depth: 2.375" not including wires.