1.This is a protable car amplifier. 2.High quality RCA input/output socket 3.looking good and nice use. This is a protable car amplifier.nice looking and use.1.High quality RCA input/output socket 2.Power switch LED display,with USB port for MP3,MP4 charge 3.3-bit sound Mode transfer switch 4.Matched input&out cable 5.High/low potential volume control 6.Technical parameter:Total harmonic ...