Item Type: AB Switch EffectColour: BlackMaterial: MetalInput Impedance: 0Output Impedance: 0Working Current: 2mAPower Supply Mode: 1 x 9V battery 6F22 (not included), or 9V power adapter (not included) 1[AB SWITCH EFFECT] AB switch guitar pedal to send the signal to two different settings, which has strong practicality. 2[CHANNEL INDICATOR] With channel indicator, the effect can switch normally when the power is not connected. 3[TRUE BYPASS] The true bypass provides transparent tone, minimizing tone loss to maintain the best sound quality. 4[WITH LED FLASH] Equipped with small LED flash to indicate the working status, which is convenient to check the running status. 5[METAL STRUCTURE] Using metal shell, with paint finish and strong structure, wear resistant and durable.