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-40V Control Power: 0.01-400W Rated Current: 8A Maximum Current: 10A Static Current: 0.02A(standby status) Frequency: 13kHz Speed Adjustment Range: 10%-100% Hole Diameter: 3.2mm Operating Temperature: -20~125 Dimensions: 75*60*28mm / 2.95*2.36*1.10in Package Weight: Approx. 73g/2.6oz Package List: 1 * DC Motor Governor