Power on and sound output have been confirmed, but since not all functions have been verified, this item is considered junk. Please understand this before purchasing. This is a 2-channel compressor/limiter with settings for EXP GATE, COMP RATIO, and more. - Model: Fostex Compressor Limiter Model 3070 - Function: Compressor/Limiter - Number of Channels: 2 channels - Settings: EXP GATE, COMP RATIO, ATTACK, RELEASE, INPUT, OUTPUT - Connection Type: DUAL MONO / STEREO - Output: OUTPUT Thank you for viewing.