I purchased this as a spare, but I'm selling it due to a sudden system change. The main unit image is of the one I'm currently using. The item for sale is unopened and unused. The JVM amp incorporates all of Marshall's know-how to date. This JVM overdrive/distortion pedal faithfully reproduces the diverse expressive power of the JVM. Intuitive control is possible, from soft overdrive to high-gain distortion with strong compression. ■SPEC Type: Overdrive/Distortion Current Consumption: 55mA Power: 9V center-negative 2.1mm adapter / 006P 9V battery 9V Battery: Usable Body Size: 101 mm (W) x 131 mm (L) x 52 mm (H)