TONE Knob, BOTTOM Knob, LEVEL Knob Indicator CHECK Indicator (Serves also as battery check indicator) Connectors INPUT Jack, OUTPUT Jack, AC Adaptor Jack (DC 9 V) Power Supply DC 9 V: Dry battery, AC Adaptor (PSA-series: optional) Current Draw 18 mA (DC 9 V) Accessory Dry battery (9 V type) S-006P/9..