Features: Heavy Metal distortion guitar effects pedal. Super mini size, durable aluminum alloy case. Supports 2 modes: BOOST or NORMAL. With volume, gain and tone adjusting knobs. LED light for showing the working status. True bypass footswitch for switching on and bypass status. 1/4" mono audio input/ output jacks. Specifications: Material: Aluminum Alloy Working Current: 31mA Power Supply: 9V DC Adapter (Not included) Item Size: 7.5 * 3.5 * 2.5cm / 3 * 1.4 * 1in Item Weight: 150g / 5.3oz Package Size: 10.5 * 6.5 * 4.6cm / 4.1 * 2.6 * 1.8in Package Weight: 205g / 7.24oz Note: The power adapter is not included. Please use the 9V 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)