VHT AV-HW-DB2 D-Boost Pedal; electric guitar effects pedal; boost; handwired on a vintage-style eyelet board, the VHT D-Boost FET clean-boost pedal faithfully replicates the FET input circuitry found in the most coveted D-style amplifier, while the original FET circuitry was built-into the amps, and not footswitchable, with no external means for level adjustment, the VHT D-Boost pedal expands the design's versatility with footswitchable convenience and an external level control, it's a true clean boost pedal, with enough clean boost to significantly overdrive your amp, and it can also enhance detail, clarity and harmonic complexity at more moderate level settings, the D-Boost's footswitch has a large aluminum ""topper,"" and it's surrounded by a cool-looking status-indicating blue LED ring; controls: level; switch: boost on/off; power supply with a 9V battery or a 9V DC power supply (coaxial connector - negative pole inside, not included, item #409939); dimensions: (l x w x h) 128mm x 94mm x 55mm