Stream and control your favorite music apps with this full-range 4-channel amplifier. Weather-resistant design works with all 12V applications. Easy pairing with auto reconnect. The 500-watt amp is compatible with audio output iPod, iPhone, smartphones, and MP3 players. Universal USB/auxiliary interface mount can be used with any radio with rear USB/RCA inputs. Comes with four 6.5" 2-way dual cone marine speakers. Amplifier measures 7-3/4"L x 3-3/4"W x 1-11/16"H. Requires 1-1/8" hole cutout.