Vahlbruch KALUNA II HV Tube Drive; Effects Pedal for Electric Guitar; pure analog overdrive/distortion pedal with ECC83/12AX7 double triode tube (250V energized) and silent switching MagTra button; 2nd version with new Structure switch that offers a higher (HOT) and lower (LOW) gain mode in addition to the familiar gain structure of the first version (V1); new overvoltage protection prevents damage to the tube if a power supply with more than 9V is accidentally connected; Controls: Drive, Bass, Middle, Treble, Volume; LED: Effect On; Footswitch: On/Off; Connections: Input (1/4" Jack), Output (1/4" Jack); Power Supply connector: Barrel Connector 5.5 x 2.1 mm, center negative; Current Draw: 500 mA; powered by a 9 V DC Power Supply (not included); suitable optional Power Supply: Item no. #409939; Dimensions: (W x D x H): 120 x 100 x 48 mm (4,72" x 3,94" x 1,89"); Weight: 375 g (0,83 lbs); Handmade in Germany; Note: Battery operation is not supported