Level, tone, and gain controls Nominal input level: -20dBu Input impedance: 1 Mohms Nominal output level: -20dBu Output impedance: 1 k ohms Equivalent input noise level: -118dBu (IHF-A, Typ.) Connectors: Input Jack, Output Jack, AC Adapter Jack (DC 9V) Power supply: 9V DC, either a Dry Battery 9V type or an AC adapter Current draw: 9 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 (including battery): 15 oz