The AUDIOZERONE AUX/USB/Bluetooth is a versatile audio paly that allows you to enhance your s entertainment and connectivity options. It features both an AUX input and USB port so you can play music from any device, as well as Bluetooth for completely wireless music streaming. Listening to your favorite playlists or now easier than ever. Its user-friendly controls let you pause, play and skip tracks intuitively from the driver's seat. With the AUDIOZERONE, you'll enjoy upgraded audio while keeping your eyes on the road。 Marine Bluetooth Amplifier 3-color(red/aux;blue/Bluetooth;white/usb),With wired Waterproof controller PREMIUM 4 CHANNEL AMPLIFIER:125 W Max x 4 @ 4-Ohms, 4-8 Ohm Stable POWERFUL 500 WATT: This amplifier is powerful with its 500 WATT maximum power supply. Class D - Power loss is significantly reduced making the amplifier highly efficient. Excess energy is stored until it’s needed instead of being converted into heat. Reduction in size/weight, reduced power waste, smaller heat sink, compact circuitry Specs - Dimensions: 7.7” x4.8” x2”, Weight 2.7 lbs.