Features: Mini and portable, and hard metal shell is stable and durable. With time, back, echo knobs, you can adjust the time, degree and tone to get the effect as you desire. The true bypass design can minimize the signal loss to help you create best performance. The LED indicator shows the working state, powered by 9V battery or DC 9V adapter(not included), convenient to use. Standard 1/4inch output and input jack fit for most guitar and amplifier. Specification: Condition: 100% Brand New and High Quality Material: Aluminum Alloy + Electron Color: as picture shown Time of Delay: 20ms-620ms Working Current: 42mA Input: 1/4'' monaural jack (Impedance: 1M Ohms) Output: 1/4'' monaural jack (Impedance: 470Ohms) Power Supply: External 9V battery or DC 9V adapter Dimensions(L x W x H): Approx. 95 x 45 x 48mm / 3.74 x 1.77 x 1.89inch Weight: Approx. 288g Packing List: 1 x Guitar Effect Pedal 1 x User Manual 1、Mini and portable, and hard metal shell is stable and durable 2、With time, back, echo knobs, you can adjust the time, degree and tone to get the effect as you desire 3、The true bypass design can minimize the signal loss to help you create best performance 4、The LED indicator shows the working state, powered by 9V battery or DC 9V adapter(not included), convenient to use 5、Standard 1/4inch output and input jack fit for most guitar and amplifier