Special order item* 2 balanced mic/ line inputs, 50 dB high gain mic preamps, switchable 24V Phantom power, 1 unbalanced summing dual RCA line input, VOX sense and contact closure priority mute of channel 3, variable output limiter, remote level control, 12 dB/ octave low cut filter at 125 Hz, high gain output for driving long balanced lines, front panel level control security covers, removable Phoenix style I/O connectors, separate ground connections, requires power supply (sold separately), Multiple mounting configurations, energy star, 4"W x 1.5"H x 2.75"D.