BOSS CL-50 Compressor Limiter, an ideal device for sound quality adjustment. - Model Name: CL-50 - Type: Compressor Limiter - Brand: BOSS - Accessories: AC adapter - Made in Japan Power-on and basic operation have been confirmed. The effect was applied, but detailed checks have not been performed due to lack of specialized knowledge. There are several scratches. Also, there are minor scratches that cannot be fully captured in the photos. Please understand that this is a used item before purchasing.