This is an item for sale, the main unit only. Please use an adapter with a center-negative 12V/380mA or higher output. (It will also work fine with a center-negative 9V/380mA adapter.) The NOVA DRIVE features an analog distortion circuit with all non-audio controls digitally controlled. It is a true-bypass dual-engine overdrive/distortion pedal that features an analog drive circuit with digital control. You can use it as a standalone overdrive or distortion, or you can use it in the following configurations: - Overdrive → Distortion (serial connection) - Distortion → Overdrive (serial connection) - Overdrive + Distortion (parallel connection) Furthermore, the digital control function is noteworthy. Each setting can be saved as a preset, up to 18 types, and it also supports preset switching via an external MIDI pedal. This is a very convenient feature for those who have a rack system or are using a switcher to organize their pedals. User Manual nova_drive_manual_jp.pdf (toneprints.com)