Dunlop Bass Mini Wah, Mini wah pedal, For bass, as well as dropped tuning, 7 or 8 string guitars, Volume and Q controls, True Hardwire bypass, AUTO-OFF circuit, Puts the pedal in bypass when the foot is raised, Aluminum casing, Power supply via 9 V battery or 9 V power supply (not included, matching power supply available under Art. #409939#), Current consumption: 3.5 mA, Dimensions (L x W x H): 133 x 75 x 65 mm (pedal pressed)