Vox Valvenergy Silk Drive, Effect Pedal for Electric Guitar, Analog preamp with Nutube tube technology, Elegant boutique sound from warm clean to bluesy crunch, Controls: Gain, Volume, Treble, Middle, Bass, Bright switch, OLED display with oscilloscope graphics in real time, 3 Operating modes for more flexibility: Standard (instrument level),, Pre-Amp (line level) and Cab Sim (signal for mixer / DAW), Input and output: 6.3 mm mono jack, DC 9 V input, Link output, Power supply: 9 V alkaline battery or 9 V power supply (middle = negative), Power consumption: 95 mA, Battery life: approx. 2 hours (when using an alkaline battery), the actual battery life depends on the operating conditions, Dimensions (W x D x H): 72 x 120 x 55 mm (including switch and rubber pad), Weight: 350 g, Colour: Silver, Includes 9 V battery for test purposes