Feature: FUNCTION: Pulse width modulation (PWM) is used to make the speed more stable and the force is high at low speed. NOTICE: This is a DC brushed motor controller, so please do not use it on AC motors. WIDELY USED: The speed controller is widely used in speed regulation of industrial DC motor, DC fan, etc. EASY TO USE: Adopt the motor of speed control mode, it has stable performance, the speed can be adjusted and it is easy to install. Specifications: Brand new Power supply voltage: DC 9V-60V Installation method: panel type and wiring according to the wiring diagram Color: Black Material: Metal + Plastic Size: Approx. 99 * 60 * 90mm Package Contents: 1 * 10A PWM Motor Speed Controller Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.