Tone, Distortion, and Level controls Nominal Input Level: -20 dBu Input Impedance: 470 ohms Nominal Output Level: -20 dBu Output Impedance: 1 k ohms Equivalent Input Noise Level: -122 dBu (IHF-A, Typ.) Connectors: Input Jack, Output Jack, AC Adapter Jack (9V DC) Power Supply: 9V DC, either a Dry Battery 9V type or an AC Adapter Current Draw: 4 mA (9V DC) Accessories: Dry Battery 9V type (6F22/9 V) Optional AC Adapter - Roland PSA-120S 2-7/8" W x 5-1/8" D x 2-3/8" H Weight: 15 oz