This is a speaker high level input harness for BAZOOKA, PLANET AUDIO, HIFONICS, BOSS, JL AUDIO, KENWOOD, CRUNCH, VISONIK, ALPHASONIK, TOTAL MOBILE AUDIO, SOUNDSTORM, DIAMOND AUDIO, POWER AKOUSTIK, SOUNDSTREAM, CERWIN VEGA, CADENCE, ZAPCO, ORION, MEMPHIS and many other brand amplifiers. This allows you to connect your factory stereo to your amplifier without RCA cables. It can also be used with head units that don't have an RCA output.