Thank you for viewing. This is a CS-3 with ACA adapter specifications. It's one of the few made in Japan. It's a best-selling product that produces a sound you can use immediately with all the knobs at the center. Since it's an old item, the electrolytic capacitors are thought to have deteriorated, so they have been replaced. (Note) This unit uses ACA power, so please be aware that it is not compatible with standard 9V adapters or power supplies. As a solution: ① Use with batteries, or refer to the following site: https://bossmania.club/aca-psa/ ② If you wish, For an additional 500 yen, ACA → PSA conversion For an additional 1000 yen, ACA, PSA, We will perform modifications to support both. ※ Other modifications: LED, if desired, will be replaced for an additional 500 yen. Please choose from the 10 colors in the photo. For the solder used to change the parts, Japanese Almit KR-19RMA is used for the main power supply section, and KESTER44 is used for the rest. Operation has been confirmed with an adapter and a 9V battery. There is no scratchiness in the knobs. Body only. Before shipping, the jacks and DC jack will be cleaned. Thank you. #compressor #compressor #sustainer Color: Blue Type: For electric guitar Effect type: Compressor/Limiter Type: Electric guitar Manufacturer: BOSS