Feature: 1. Easy Control: Comes with a switch and 3pcs control knob, the operation of this effect pedal is much easier. 2. High Accuracy: Ensuring high sensitivity and high accuracy as well, making your playing more attractive. 3. Practical Use: With 2 modes to choose from, the pass through hardware ensures fair sounding effects. 4. Reliable Use: The output impedance is 1k ohms, and the input impedance is 1M ohms, stable and reliable. 5. Metal Shell: All metal shell with pretty yellow painting will provide good protection for effect pedal. Specification: Item Type: Guitar Effect Pedal Colour: Yellow Material: Metal Input Impedance: 1M Ohms Output Impedance: 1k Ohms Product Applicable Power Supply: 9V DC power adapter (the product does not include a power adapter). . Package List: 1 x Guitar Effect Pedal1 x User Manual1 x Hoop and Loop Fastener1 x Sticker Note: Note that the positive and negative of the effect pedal should be the same as the positive and negative of the power supply.