Features: This is a simple and easy-to-use DC brushed motor speed controller of elegant appearance and stable performance. Speed controller is made with high quality circuit board which ensures a longer service life. Designed with screw terminals for quick and convenient wire connection. This motor speed controller has switch function, and can also accomplish CW/CCW rotation control. High performance DC motor speed governor has large power, small heating, high efficiency and high moment of force, while no loud noise. Specification: Model: CCM2NJ Working Voltage: 12-40V DC (output voltage is about 0-100% of input voltage) Control Power: 12V=36W, 24V=72W....40V=120W Rated Current: 3A Maximum Current: 5A Speed Control Range: 0-100% PWM Frequency: 15KHZ Potentiometer: Resistance B100K, opening 8mm Size(L x W x H): 73 x 39 x 31mm / 2.9 x1.5 x 1.2in Weight: 74g / 2.6oz (approx.) Package list: 1 x Speed Controller Note: 1, This speed controller is used for DC burshed motor. 2, It is not suitable for DC brushless motor; can not be used as a voltage regulator or voltage stabilizer. 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.