Features:1. This is a simple and easy-to-use DC motor speed controller of stable performance.2. Speed controller is made with high quality circuit board which ensures a longer service life.3. Equipped with fuse tube to protect the speed controller from burning out that short circuit causes.4. With reverse connection protection function.5. Designed with convenient screw terminals for quick wiring.Specification:Input Voltage: DC 12V-40VControl Power: 0.01-400WRated Current: 8AMaximum Current: 10AStatic Current: 0.02A(standby status)Frequency: 13kHzSpeed Adjustment Range: 10%-100%Hole Diameter: 3.2mmOperating Temperature: -20~125Dimensions: 75*60*28mm / 2.95*2.36*1.10inPackage Weight: Approx. 73g/2.6ozPackage List:1 * DC Motor Governor