Compatible with Mac OSX, Win XP, ME, and 2000. Built-in DSP effects processor. 16 low-noise RQ™ (reference quality) microphone inputs with insert points. Channels 17/18 and 19/20 with switchable dual stereo line inputs. 3-band EQ on all channels. Clip LEDs, signal, and mute indication. Two pre-fader monitor sends. One post-fader effects send. Precision 60mm faders on input channels and stereo master output. Control room outputs, global 48V phantom power. Tape for monitoring the room and tape for mixing duties. Stereo outputs with unbalanced and balanced 1/4" XLR connectors. Rugged console design. Universal switching power supply. USB port for connecting to a computer to record or play back digital audio to/from the computer.