Specification: Color :Black . Can be plug in with Ipod,MP3/MP4 . Compact Size: 150mm (D) X 92mm (W) X 43mm (H). It has Blue LED light round Volume Knob. Aluminum alloy solid case and also easy to distribute the heat. Audio input: RCA x 1 DC Power socket (5.5mm/2.5mm) x 1 Output Speaker OUT (Left) x 1 pair (+ / -) Speaker OUT (Right) x 1 pair (+ / -) Power Indicator (Blue LED) x 1 Power Supply input DC 24V Package include: 1xSMSL SA-50 Digital Amplifier 1xOriginial SMSL DC24V 4.5A Power Supply