I am selling a fully functional, used YAMAHA compressor. Battery and power supply operation have been confirmed, and there is almost no scratchiness. This pedal really makes your instrument's sound stand out. If you want to boost your clean tone without distortion, consider this. It has a retro design reminiscent of a Transformers side character, which I think is very cool. This is a fully functional, discontinued product, so it may become difficult to obtain in the future. Please take this opportunity to consider it. The box and manual are not included; only the unit itself is for sale. Please check the photos for scratches. I really like this effect pedal, but unfortunately, I have another awkward payment to make this month... so please consider it. This is a used item, so please refrain from purchasing if you are overly sensitive. Price reduction is not possible. Thank you for your understanding. From AI: YAMAHA CO-10M Compressor effect pedal, with adjustable OUT LEVEL, ATTACK, and SUSTAIN. - Model: CO-10M - Function: Compressor - Controls: OUT LEVEL, ATTACK, SUSTAIN Thank you for viewing. #Yamaha #YAMAHA #Compressor