BOSS (Roland brand) CL-50, a 1-channel mono compressor/limiter. This model is well-regarded as professional equipment and is widely used in live PA, recording, and sound systems. It is equipped with standard parameters such as Threshold, Ratio, Attack, Release, and Output Level, and is easy to use. [Operation Check] ・Power on, audio input/output, and compressor operation, basic operation confirmed. ・No problems such as scratchiness or unusual noise were found. [Condition] ・Scratches on the bottom. ・Almost no scratches visible! Includes genuine AC adapter [BRA-100] [Accessories] ・Main unit ・Power adapter (operation confirmed, 12V AC type) [Notes] ・This unit is for "AC 12V (alternating current)" adapter only (will not operate with DC). ・Please purchase only if you understand that this is used equipment.