This is a professional router speed control. These are used with single speed routers to raise and lower the rpm of the motor. These are very useful when using larger bits in your router. Voltage is 110-120, 15amp, 6' cord, 3 way rocker switch for vs/off/full speed, standard US 3 prong plug. The unit allows for full horsepower and torque at all speeds from 0 to full rpm. The electronic feedback maintains speed by increasing voltage to the motor as the load increases. The unit can sit on a workbench or clip onto a belt. Shipping on this item is free via USPS or UPS. I do combine shipping wherever possible. I do ship internationally. Just email me and I will quote shipping to your country.