1WIDE USES: The router speed controller can adjust speed, temperature, voltage and light, suitable for US standard A and B plugs, widely used in exhaust fans, tungsten light bulbs, electric furnaces, angle grinders, marble machines, blowers 2HIGH ACCURACY DISPLAY: The variable speed control of rheostat adopts accurate pressure adjusting knob for pressure adjustment, possess high accuracy, you can accurately understand the working voltage of the machine through the digital display 3FLEXIBLE ADJUSTMENT: The fan speed controller adopts stepless speed regulation and easily shift gears according to actual conditions, so that more appliances can be applied and easily controlled 4MULTIPLE PROTECTION: 15A overload protection switch with independent switch control input, output voltage, overload, short circuit protection, instead of boat switches and fuses 5BACK HOOK DESIGN: In order to facilitate the operation of the angle grinder, a hook is specially designed on the back of the governor, which can be hung on the tool kit of the governor, easy to carry, more convenient to use, plug and play, simple and practical Item Type: Fan Speed Controller Plug Specification: US Plug 100-120V Input: 100-120V Output: 0-120V Speed Control Mode: Stepless speed control Maximum Input Current: 15A Maximum Input Power: 4000W 1 x Fan Speed Controller This governor is not suitable for use with circuit boards and capacitive electronic components, such as bedside clip on fans, micro fans, small ceiling fans, LED energy saving lamps, microwave ovens, induction stoves, light wave stoves, washing machines, rice cookers, fish tank pumps, brushless synchronous motors, etc.