The BD-2 Blues Driver delivers the creamy, yet crunchy tones reminiscent of great blues guitar. This best selling pedal offers instant access to the warm overdrive and emotive harmonics typically found in yesteryear's classic tube amps. Features: Classic blues guitar tones with tube amp simulation Warm distortion and overdrive Responds to nuance and volume changes AC adaptor or 9V battery operation Specifications: Nominal Input Level: -20 dBuInput Impedance1 M ohm Nominal Output Level: -20 dBuOutput Impedance1 k ohm Recommended Load Impedance: 10 k ohms or greater Controls: Pedal switch GAIN knob TONE knob LEVEL knob Indicator: CHECK indicator (Used for indication of check battery) Connectors: INPUT jack: 1/4-inch phone type OUTPUT jack: 1/4-inch phone type DC IN jack Power Supply: Carbon-zinc battery (9 V, 6F22) or Alkaline battery (9 V, 6LR61) AC adaptor (PSA series: sold separately)Current Draw20 mA Dimensions: Width: 73 mm Depth: 129 mm Height: 59 mm Weight: 360 g