YUER RF-12 Dyna Compressor A re-creation of the classic Ross compressor, with very low noise. Use the Sustain, Attack, and Level knobs to find your ideal tone. Tweek the Attack to boost your bottom end and level off high-output pickups.True bypass design minimizes tone loss. Aluminum alloy casing with sand blasting finish. ***These pedals are not to be confused with some others that look the same, I will not mention them,The electronics of YUER pedals are far more superior.*** Model: YUERMain Material: Aluminum alloyInput Impedance: 500K OhmsOutput Impedance: 10K OhmsRunning Current: 100mAPower Supply: DC 9V Adapter (Not included)Item Size: 92 * 42* 52mmItem Weight: 144g / 5.1ozPackage Size: 10.5* 5.8 * 5.2cm / 4.1 * 2.3 * 2inchPackage Weight: 170g / 6oz Note: Power supply not included. Please use a 9V DC power adapter whose polarity is negative center 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.