Features: Mini and portable, and hard metal shell is stable and durable. True bypass design makes it loss less signal to give you high quality sound quality. With level, back, delay knobs, you can adjust the volume, degree of feedback, the lasting time of effect. The LED indicator shows the working state. 1/4'' standard interface fits most of equipment. Powered by 9V battery or DC 9V adapter(not included), convenient to use. Specification: Condition: 100% Brand New and High Quality Material: Aluminum Alloy + Electron Color: as picture shown Jack: 6.35 mm / 0.25 inch Working Current: 36mA Power Supply: External 9V battery or DC 9V adapter Dimensions(L x W x H): Approx. 75 x 36 x 26mm / 2.95 x 1.42 x 1inch Weight: Approx. 200g Packing List: 1 x Guitar Effect Pedal 1 x User Manual 1、Mini and portable, and hard metal shell is stable and durable. 2、True bypass design makes it loss less signal to give you high quality sound quality 3、With level, back, delay knobs, you can adjust the volume, degree of feedback, the lasting time of effect 4、The LED indicator shows the working state. 1/4'' standard interface fits most of equipment 5、Powered by 9V battery or DC 9V adapter(not included), convenient to use