Use your phone or radio to pump great sound via Bluetooth through some Marine Grade Speakers. This speaker pack includes a JL Audio Marine 4-channel amplifier with 280 watts of power (70W x 4@2 Ohms / 50 W x 4@4 Ohms). The JL Speakers are marine grade with titanium sport grilles, they have a standard flange of 6.5-Inches. This kit comes with a IPX67 weatherproof Bluetooth controller/receiver, with a wireless connection range of up to 35 feet. The Bluetooth controller has dimensions of 2-3/16″ Diameter x 2-3/8″ Depth. Please note, electric vehicles will require a DC/DC converter for operation.