Description: This is a simple and easy-to-use DC motor speed controller with small size, elegant appearance and stable performance. It is manufactured with high quality printed circuit board which ensures a longer lifespan. Packed with anti-static bag, you don't need to worry about damage caused by static electricity during transportation. Features: Well made with high quality circuit board, long service life. Simple and easy to use DC motor speed controller. Small size and elegant appearance. The performance is very stable. The maximum current up to 20A, heat sink and fan are required. Packed in an anti-static bag to protect it from damage caused by static electricity during transportation. Specifications: Voltage: DC10-60V Maximum output current: 20A (10A, less than 450W recommended if continuous use, improves the heat dissipation) Maximum power: 1200W Speed regulation type: Current adjustment Speed regulation mode: Potentiometer (linear) Speed regulation duty cycle range: 0-100 % Control frequency: 25KHZ Wiring methods: Barrier strip screw terminals Button wire length: 20cm/7.87 Size: 7.6 x 4.4 x 2.7cm/ 2.99 x 1.73 x 1.06" Weight: about 77g Package includes: 1 x Speed Controller Note: 1. Make sure the positive and negative polarity are connected correctly 2. The wiring should not touch the heat sinks, otherwise it may burn the circuit board. This is not a power module. The module is first connected to the motor, then it can control the speed 3 .Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 4. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.