Xotic EP Booster Chrome LTD, booster, chrome limited edition, only 1.500 pieces world wide, analog, based on legendary preamp of the EP-3 echo machine, discrete FET design, up to 20 dB of boost, true bypass, metal housing, status LED, internal DIP switches for choosing boost frequencies and EQ settings, incl. Xotic XVD-1 voltage doubler for increasing head room, incl. Xotic XKC-1 knob cober, power via 9V battery or 9V - 18V DC power supply (not included), barrel type plug: 2,1 mm x 5,5 mm, polarity: center (-), ring (+), dimensions: 89 (D) x 38 (W) x 38 (H) mm, weight: 260 g (without battery), made in USA.