Hello, my name is Gary :) Over the past few years many ADVrider members mentioned hearing about the amplifier I build for motorcycle riders here in the Forums. Some suggested that I make a post in the Vendors section. The AmpliRider is an amp takes up to three inputs (such as a GPS, radar detector, or MP3 player), makes them louder, then combines them into one output so you can hear everything at the same time through a set of headphones or helmet speakers. The remote volume controller attaches to the amp with a 6-foot cord can be mounted in an easy to reach spot on the bike so you can adjust the volume as you ride. The amp wires directly to the bike's 12 volt supply and does not need any batteries. More information can be found on the website below: http://electric-avenues.com/audio/amplirider/ The amp is offered directly for U.S. $70 which already includes insured, Airmail shipping worldwide. This also includes a lifetime free repair warranty. If there are any questions about the amp please let me know and I will be glad to help. Have a nice day!