- Model Name: CS-3 - Brand: BOSS - Color: Blue - Accessories: Box - Power: 9V battery or AC adapter Operation with AC adapter confirmed. Battery operation not confirmed. Selling to organize equipment. This is an effector that makes the individual notes of songs with intense cutting sound clear and provides a pleasant sustain. Used in live houses, so there are scratches and dirt from being carried around, but there are no issues with its use. Please understand that this is a used item and only purchase if you accept no returns and no refunds. Guitar Effecter Compressor