This is an open box item (unused). Here's the factory description:
About this item
- 4 screaming-loud (130 mW per channel) stereo headphone amps
- Wide dynamic range
- Can serve as control room monitor control w/ level control & Monitor Mute button
- Daisy-chain multiple units via 2 balanced ¼” monitor outputs
- Compact 1/3U rack-mount chassis
- Mono summing switch
- 2 balanced ¼” line inputs