I don't know the specifications, but I don't know how to power it with batteries. It flashes when powered by batteries. Sound comes out, but it's not distorted. However, there's no issue when using a DC cable. The batteries inside are dead, so please replace them. I haven't actually used this equipment, but I'm saying this based on using the same model. ■ Guitar Effects Pedal ■ Distortion ■ True Bypass ■ Independent Boost Function ■ Master Controls: volume, treble, middle, bass, gain ■ Jacks: input, output, remote No box, just the unit ~From the manufacturer's website~ ■ The Bogner Uberschall amplifier, born in 2001, is still hand-built one by one in Los Angeles, California. This ferocious Uberschall pedal, dubbed "Armageddon in a Box," perfectly recreates the ruthless and extreme high-gain sound of the Uberschall amplifier. While the Uberschall pedal can also produce classic low/medium gain sounds, don't forget that the essence of this pedal is its brutal, everything-melting high-gain sound! Reinhold, the designer of Bogner amplifiers, did not use op-amps or diode clipping when designing the Uberschall pedal, but instead used five discrete Class A gain stages to perfectly reproduce the high-gain channel of the Uberschall amplifier. This innovative approach has succeeded in creating a sound with clarity, touch sensitivity, and excellent separation, which was not possible with past distortion pedals. The Uberschall operates on a 9V battery or a 9V DC power supply, but due to Reinhold's advanced circuit design, the voltage is significantly boosted internally. This high voltage brings an amazing dynamic range to the sound, just like the tube design of the legendary Uberschall amplifier. #Mrs. GREEN APPLE