1This guitar effects pedal simulates the tone and clarity of 57 Deluxe, very practical 2Possess 6 controls for controlling the equalizer and super speed response: low, medium, high, level, sound and drive 3Aluminum alloy shell posse higher strength, specific strength is close to high alloy steel, specific stiffness exceeds steel 4Come with good corrosion resistance, so the material of this product is very good 5American sound pedal have stable structure, excellent performance and long service lifeItem Type:AmericanSoundPedal Material: Aluminum alloy shell Power Requirements:AC adapter 9v DC(pay attention to the positive and negative poles of the power supply) Current Consumption: 50mA Size: Approx. 11.9 x 9.4 x 3.8cm / 4.7 x 3.7 x 1.5in 1 xAmericanSoundPedal 1 x Battery Cable 1 xAmericanSoundPedal Footpad The customers need to purchase an external power supply by themselves to be powered on