A. STYLISH APPEARANCE: This is a simple and easy-to-use DC motor speed controller with small size, elegant appearance and stable performance. This speed controller has a delicate and practical case which is waterproof so you can use it outdoors B. CONVENIENT WIRING: Comes with a screw terminal block and a label showing power and motor electrodes for convenient wiring. The controller input of DC motor is connected to DC current, can not be connected to AC current, otherwise it will be burnt C. LONG LIFE: Made with circuit board which ensures long life. longer life D. The input voltage can be between 10V and 60V, and the output voltage is between 0 and 100% of the input voltage. This speed controller is very convenient to adjust E. Make sure the positive and negative polarities are connected correctly. ected, otherwise the controller will be damaged. Suitable for 12V motors with power less than 120W, 24V motors with power less than 240W, etc.