in good working condition. 

From Behringer:

• Interactive dual-channel compressor / limiter / expander / gate

• Switchable IKA (Interactive Knee Adaptation) program-adaptive compression circuitry combines the advantages of hard-knee and soft-knee characteristics

• Automatically or manually adjustable attack and release times

• IRC (Interactive Ratio Control) expander/gate circuitry for virtually inaudible noise suppression

• IGC (Interactive Gain Control) peak limiting circuitry combines clipper and program limiter for reliable and inaudible protection against signal peaks

• Selectable dual-mono or stereo ("true-stereo") operation

• Precise LED meters for input/output levels and gain reduction

• Key input and listen

• Selectable operating level (+4 dBu/-10 dBV)

• Servo-balanced inputs and outputs with ¼" TRS and XLR connectors

• Relay-controlled hard bypass switch with auto-bypass function in case of power failures (safety relay)

• High-quality components and exceptionally rugged construction ensure long life