Features: Giving you a classic blues overdrive sound. LEVEL knob: adjust the of the overdrive sound; TONE knob: adjust the tone color. GAIN knob: adjust the gain of the overdrive sound. Micro size and full metal shell, portable and durable. With true bypass footswitch and LED indicator light. Specifications: Material: Metal Signal Input: 1/4″Monaural Jack (impedance: 1M Ohms) Signal Output: 1/4″Monaural Jack (impedance: 1K Ohms) Power Supply: DC 9V adapter (center minus plug)(not included) Working Current: 6mA Item Size: Approx. 3.5 * 9 * 3cm / 1.4 * 3.5 * 1.2in Item Weight: Approx. 140g / 4.9oz Package Size: 10.5 * 6 * 4.5cm / 4.1 * 2.4 * 1.8in Package Weight: 165g / 5.8oz Note: The power adapter is not included. Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual(English & Chinese) Giving you a classic blues overdrive sound. LEVEL knob: adjust the of the overdrive sound; TONE knob: adjust the tone color. GAIN knob: adjust the gain of the overdrive sound. Micro size and full metal shell, portable and durable. With true bypass footswitch and LED indicator light.