One iPod dock with full set of adaptors.One USB input.Recharge iPod during playback.1 x master output (2 RCA) 1 x rec out (2 RCA) The uMix-3 is a 2-channel audio/video mixer with full 3 band EQ for iPods and USB devices. The unit features a lightweight ABS casing and provides a single iPod dock and a USB input. Channel 1 is dedicated to one iPod and Channel 2 is dedicated to the USB input. Just simply plug in your iPod and USB device and start mixing right away. The front panel of the unit contains direct access to the microphone volume and tone, as well as the headphone volume. The uMix-3 also features a dual video output so that music videos that are being mixed can be displayed on an external video device like an LCD TV.