Features: 1. This is a simple and easy-to-use DC motor speed controller of elegant appearance and stable performance. 2. Speed controller is made with high quality circuit board which ensures a longer service life. 3. This speed controller can change rotation direction of DC motor by adjusting the line sequence. 4. Easy to use, simply rotate the knob to change output so to change the rotary speed of DC motor. 5. Designed with convenient screw terminals for quick wiring. Specification: Model: CCM96SK Input Voltage: DC 10-60V (Output voltage is about 0-100% of input voltage) Control Power: 12V*10A=120W, 24V*10A=240W, ... Rated Current: 10A Maximum Current: 20A Speed Adjustment Range: 5%-100% Potentiometer: resistance B100K; opening 8mm PWM Frequency: 25kHz Size: 88*59*35mm / 3.46*2.32*1.38in Package weight: Approx. 98g/3.4oz Package List: 1 * DC Motor Governor Note: 1. DC motor speed controller can not be directly connected to AC, or it will burn out. 2. DC power supply can not reverse the positive and negative pole, otherwise the governor will be damaged. 3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.