This 4 channel amplifier is an all in one Bluetooth amplifier that provides a price point driven audio solution. Walk up to the amplifier, pair your media device, and control tracks and volume through your media device. This is the perfect solution for small boats, golf cars, and UTV's! The product itself measures a compact 5 1/4 x 4 1/4 x 1 3/4. This product will arrive with screws, an extra fuse, and the power and speaker harness. Wattage is 4x45W Peak @ 4 ohms.