The MS-790 is specially designed with a cradle that is compatible with all iPod nano and 4G/3G/2G iPod shuffle. An additional adapter is included to fit the latest 6G nano with the speaker.3.5mm audio input will work with all audio sources. Alternative Auxiliary Input for Additional Connectivity: iPod®, MP3 Players, Portable CD Players, PC, Macintosh & Portable Game Consoles An Optimal Audio Experience in a Compact Design Operates with Batteries, USB Power or AC Adapter (not included) SYSTEM SPECIFICATIONS 4 Watts Total Power Output •Pre-amplified & Magnetically Shielded •2 Watts per Channel •2 x 1.5" Full Range Drivers •Frequency Response: 120Hz – 20KHz •Signal Input: 3.5mm Stereo Input •Functions: Power & Volume Control •LED Indicator: Power LED Indicator •Power Source: USB Power (DC 5V), Batteries (4 x AA 1.5V ), suggested AC Adapter (DC 6V 400mA) •Accessories: Power Input USB Cable, 4AA Batteries, 3.5mm Stereo Input Cable, Carrying Bag Type: docking speaker iPod Compatibility: nano, shuffle Features: Alternative Auxiliary Input for Additional Connectivity: Color: Black Specifications: 4 Watts Total Power Output 4th Gen iPod touch Compatible: 3.5mm stereo input connection 3rd Gen iPod touch Compatible: 3.5mm stereo input connection 2nd Gen iPod touch Compatible: 3.5mm stereo input connection