MacTop Universal Dock Station Cradle For iPod Nano Video Mini 4G Dock Station is a convenient home base for charging and syncing or for connecting iPod to your other audio/ video system Dock connector :connect the dock station to your computer or an iPod power adaptor iPod Connector: Place your iPod in the deck station to change the battery, copy songs, and others Infrared Receiver (IR): Control playback from a distance using the optional remote controller (Remote controller is not included) Line out port: Connect speakers using an audio cable with standard 3.5 m stereo plug. Or connect an iPod AV cable to view photos or videos (iPod Video) on a TV or other video device.