Check out Kicker 40PXIBT502 2 Channel Portable Bluetooth Stereo Amplifier. Using Bluetooth, the amplifier pairs with any mobile device and allows it to serve as the source unit in a mobile system; No need for oversized head-units or hours of installation. Its compact design makes for easy and convenience installation on outdoor vehicles. Great for hot rods, motorcycles, UTVs, golf carts, boats, ATVs, tractors, snowmobiles, riding lawn mowers, etc.; backlit remote easily mounts on handlebars or dash

General Features:

• 2-Channel Amplifier w/ Bluetooth A2DP Connection
• Includes Remote
• RMS Power Rating:
• 4 ohms: 15 watts x 2 chan.
• 2 ohms: 25 watts x 2 chan.
• Bridged, 2 ohms: 50 watts x 1 chan.
• A2DP Bluetooth connection allows music source to play wirelessly
• LED power (green) and protect (red) indicators
• Included Blue-backlit remote is easily mounted
• 2 or Mono channel operation
• Speaker-level (high-level) inputs with signal sensing for automatic turn-on
• Preamp RCA outputs to daisy chain multiple amps
• 3-way protection circuitry (thermal, overload, and speaker short protection)
• CEA-2006 compliant amplifier
• Frequency response: 20-20000 Hz
• 8 gauge power and ground wiring is required for installation (not included)
• Dimensions: 3-1/2"W x 5-1/2"L x 2"H
• http://www.youtube.com/watch?v=gmQNZdnq-08