Operation confirmed. Modified for AC 9V operation. Battery operation not possible. The back cover has disappeared somewhere. The power cable won't come out if the back cover is present. The dual footswitch FS-6 can be easily connected with A/B terminals and allows for polarity setting. - Model Name: FS-6 - Brand: BOSS - Type: Dual Footswitch - Connection Terminals: A/B terminals - Function: Polarity setting - Power Type: AC adapter Used only a few times at home. Never used live. Selling to organize equipment. No smoking. No pets. Please understand that this is a used item and purchase with your consent. Due to the nature of the product, returns and claims are not accepted after purchase. Thank you for your understanding. Thank you for viewing.