Replacement (aftermarket) AC Power Adapter for the following Boss Products: Dr Rhythm DR-110, RC-30 Loop Station, "Fender '59" FBM-1, "Fender Reverb" FRV-1 & "Fender '65" Deluxe FDR-1. These power supplies use a center negative pin as required by these products. Do not use positive center pin power supplies with these units! It will damage them. Specifications: I/P AC:100V~240VAC 50-60Hz O/P DC:9V DC 1A Chord: 43in Tip: (-)center, (+)outer