Provide synchronization,recharging and playback for iPod Dock and play directly Different adaptors for iPod Nano,iPod Mini,iPod 20GB,iPod 40/60GB,iPod Video 30G/60GB. AC adaptor included 2pcs of 3 inch bass drive and 2pcs of 1 inch tweeter With remote control for speaker unit and iPod Powerful and purified sound 3.5mm audio jack for other MP3,CD,PC..... Output power:15W*2