The BD-2 Blues Driver delivers the creamy, yet crunchy sound associated with great blues guitar. This popular pedal provides instant access to the kind of warm overdrive and emotive distortion usually reserved for 30-year-old tube amps. Classic "blues" guitar tones with tube amp simulation Warm distortion and overdrive Responds to nuance and volume changes AC adaptor or 9V battery operation BOSS five-year warranty Specifications Nominal Input Level -20 dBu Input Impedance- 1 M ohms Nominal Output Level -20 dBu Output Impedance -1 k ohms Equivalent Input Noise Level -118 dBu (IHF-A, Typ.) Connectors -INPUT Jack, OUTPUT Jack, AC Adaptor Jack (DC 9 V) Power Supply- DC 9 V: Dry Battery 9 V type (6F22/9 V), AC Adaptor Current Draw- 13 mA (DC 9 V) Accessories - Dry Battery 9 V type (6F22/9 V) Option- AC Adaptor (PSA-Series) Size and Weight ( incl. battery ) Width 73 mm2-7/8 inches Depth 129 mm5-1/8 inches Height 59 mm2-3/8 inches Weight 400 g0 lbs. 15 oz.