YUER RF-14 Roll Boost Classic A circuitry, a flip of the switch gives you up to a 35dB boost. Supports a maximum input of 18V DC voltage. True bypass design. ***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: YUER Main Material: Aluminum alloy Input Impedance: 500K Ohms Output Impedance: 10K Ohms Running Current: 100mA Power Supply: DC 9V Adapter (Not included) Item Size: 92 * 42* 52mm Item Weight: 144g / 5.1oz Package Size: 10.5* 5.8 * 5.2cm / 4.1 * 2.3 * 2inch Package 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 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.