Electric guitar dynamic compressor effect pedal for guitar players.2 functional knobs(OUTPUT/SENS) for adjust the performance of compression.True bypass footswitch for switching between compressor and bypass status.LED light for indicating effects or bypass status.Full metal shell and compact size, durable and portable.Specifications:Input: 1/4" monaural JackOutput: 1/4" monaural JackPower Supply: DC 9V AC adapter (center minus plug)(not included)Item Size: 9.3 * 3.8 * 3.2cm / 3.7 * 1.5 * 1.3inItem Weight: 140g / 4.9oz Note: Power supply not included. Please use a 9V DC power adapter whose polarity is negative centre otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual(English & Chinese) 1 * Year warranty through our store No Duty to Canada and USA FAST 'N FREE USA Shipping (typically about 4 days via USPS ) Ships from Canada *Just to be clear on DUTY, (regardless of what eCRATER warns buyers of ) Canada and the USA have a trade agreement in place that allows US citizens to purchase/import up to $800 dollars per purchase in to the United States from Canada with NO Duty at all, State taxes are another story, some states charge a TAX some do not, BUT NO duty.