Art Tube Compressor. It has minor scratches, dirt, and signs of use, but is in generally good condition. Power is supplied, and all lights and knobs appear to be functioning as intended. However, I was unable to check the audio because I no longer have the equipment to test it. Therefore, this is sold "as is." Please understand that it has only been in the hands of people once. Also, in terms of preventing substitution, we do not accept returns under any circumstances. *No smoking, no pets. *We will clean it as much as possible, but please forgive any details or dirt that cannot be removed. *Recycled materials are used for packaging. With dual VU meters and a 2-channel dynamic processor, it allows for multi-functional adjustment and improves sound quality. - Model Name: PRO VLA II - Number of Channels: 2 channels - Output Level Adjustment: With master output level adjustment - VU Meter: Equipped with dual VU meters - Input Threshold Adjustment: Input threshold adjustment function - Ratio Adjustment: Ratio adjustment function Thank you for viewing.