Waterproof motorcycle sound system from Big Bike Parts comes as a complete kit including waterproof amp and volume control. With waterproof 2-1/2" chrome speakers this unit provides a sound quality unmatched by the more expensive systems. Volume control has a 3.5mm universal aux-in connection that is compatible with iPod, MP3 and other portable players including satellite radio systems. Speakers are able to be mounted to the handlebars with 7/8" and 1" fitments, flat surface mounted or mounted to the mirrors with included brackets. Unit is also available with black speakers # 13-250BK or with Bluetooth option # 13-252BT. Universal fitment on any motorcycle, ATV, Jetski.