Multi-effects unit for bass with a variety of effects. AC adapter included. Effect case will be given as a bonus. Please let me know if you don't need it. Used a few times at live houses. Copied from the official website below: The ME-20B is a basic model in the ME series, which is popular as a cost-effective multi-effects unit for bass. The high-quality sound inherited from the ME-50B and its simple operability make it the perfect model for bassists who are using a multi-effects unit for the first time. Specifications ■ Multi-effects unit for bass ■ Patches: 30 (user) ■ Effects: T Wah Up, T Wah Down, T Wah Edge, Defretter, Octave, Compressor, Overdrive, Distortion, Overdrive + Direct, Synth 1, Synth 2 ■ Chromatic tuner included ■ Controls: SFX/1 pedal, COMP/2 pedal, DELAY/3 pedal, Expression pedal ■ Connectors: Input jack (standard type), AUX in jack (stereo mini type), Output jack L/MONO, R (standard type), Headphone jack (stereo standard type), Foot switch jack (TRS standard type), AC adapter jack ■ Power supply: DC9V, 6 x AA batteries, AC adapter (sold separately) ■ Current consumption: 90mA * Battery life during continuous use (varies depending on usage conditions) = Alkaline batteries approx. 13 hours / Manganese batteries approx. 3.5 hours ■ Dimensions, weight: 294W x 179D x 54Hmm, 1.5kg ■ The ME-20B employs a simple user interface that allows you to operate it with the feel of a compact effector. You can intuitively edit effects by turning the knobs and turning the pedals on/off. A newly developed DSP chip is installed in the heart of the effect processing. It enables powerful sound making that rivals the high-end models. The ME-20 is equipped with a variety of BOSS effects, including distortion and fuzz, as well as chorus and delay.