This is a 2-channel dynamic processor from Behringer. It's a board with a noise gate, compressor, de-esser, and limiter, with two mono channels. I'm selling it because I no longer need it due to rearranging my equipment. I also purchased it used, so please understand that there is some wear and tear. It was working fine for basic use. As equipment, it's a standard dynamic processor, suitable for basic sound adjustments such as cutting noise when there's no input from a microphone, adjusting dynamics with the compressor, and securing an upper limit with the limiter. The indicators are very easy to understand, making it suitable for beginners.