The VALVENERGY series offers four valve distortion pedals that provide the feel and harmonics of a tube amp, using an all-analog signal path and Nutube. This series offers four pedals, each inspired by a classic amp sound. The three modes found in each pedal offer standard use, line-level preamp output, and an analog cab sim output. In addition, the new channel switching mode allows two or model VALVENERGY pedals together. What is Nutube? Nutube is a new vacuum tube that was developed by KORG Corporation in conjunction with Noritake Itron Corporation as an application of vacuum fluorescent display technology. Like a conventional vacuum tube, a Nutube has an anode grid filament structure and operates as a complete triode tube. It provides the same rich overtones and responses that are distinctive of conventional vacuum tubes. Valvenergy Copperhead Drive SPECIFICATIONS INPUTS/OUTPUTS INPUT jack, OUTPUT jack, DC9V jack, LINK jack CONTROLS GAIN knob, VOLUME knob, TREBLE knob, MIDDLE knob, BASS knob, BRIGHT switch, MODE switch POWER SUPPLY* 1 x 9V alkaline battery or 9V center negative AC adaptor *: The use of an AC adaptor is recommended as the unit’s power consumption is relatively high. Should you prefer to use batteries, please use the alkaline type. CURRENT CONSUMPTION 95 mA BATTERY LIFE Approx. 2 hours (When using the alkaline battery. This figure will vary depending on the actual conditions of use.) DIMENSIONS (W X D X H) 72 mm x 120 mm x 55 mm/2.83″ x 4.72″ x 2.17″ (Including the switch and foot rubber) WEIGHT 350 g/12.35 oz. (Excluding the battery) INCLUDED ITEM 1 x 9V battery for checking operation ACCESSORIES (SOLD SEPARATELY) AC adaptor