Super Bass Audio Stereo Subwoofer Amplifier 2.1 Channel FOR Car Home CD Mp3 AMP
It also has a jack for plugging your MP3, MP4, iPod or CD player. 1 x Hi-Fi Stereo Amplifier(not include power adapter, you could use your old one) Power plug:2.1x5.5mm. - Stereo sound and heavy bass output.