I bought this three years ago and used it for about six months. It has some minor scratches, but I think it's in good condition! Operation has been confirmed. There is no AC adapter, but thank you. This is a dual-band compressor with a variety of control functions to improve sound quality. - Brand: EBS - Model Name: MULTI COMP - Type: Dual-band compressor - Controls: SEND, GAIN, MODE, COMP - Country of Manufacture: Sweden Thank you for looking.