This 2-channel professional DJ mixer is simple but powerful and perfect for the modern DJ. It takes two stereo RCA line level, one of which can also be used for phono input. A ground screw is provided for the phono. The key feature is the USB input: now you can connect your Pyle Pro mixer to your computer! Perfect for DJs who use laptops with computer software like Reason, Ableton, Traktor, etc. to perform their mixes. The USB cable connects to your PC or Mac and provides a digital connection between the audio output of your computer and the input on this mixer. Each channel has rotary EQ high/low and gain controls for total control of your sound. There's a mic input with volume control. The crossfader lets you move between channels for the ultimate mix. Outputs include a master RCA and a 1/4" headphone jack. Runs on 115/230 V.