1) 2.1 channel 2) High quality amplifier built in, with remote control for iPod 3) Ultra portable and foldable design, easy to bring 4) With a 3.5 input jack, work with any audio player with a 3.5 jack 5) USB data cable, can connect it with PC to use iTunes directly 6) Video output, can connect iPod video with TV directly Specifications: 1) Power supply: AC adaptor (9V, 1A) 2) Output power: 3 x 2 + 5 (SUB) 3) Speaker: 36mm speaker, 4ohms (L, R), 66mm sub speaker 4) Input interface: stereo 3.5mm silver-plated 2 heads 5) Packing content: speaker, adaptor, 2 head 3.5mm stereo cable