Feature:FUNCTION: Pulse width modulation(PWM) is used to make the speed more stable, and the strength is high at low speed.NOTICE: This is a DC brush motor controller, so please don't use it on AC motors.WIDE USE: The speed controller is widely used in industrial DC motor speed regulation, 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.Specification:Brand newSupply Voltage: DC 9V-60VInstallation : panel type, and wiring according to wiring diagramcolour: blackMaterial: metal + plasticsize: approx. 99*60*90mmPackage Contents: 1* 10A PWM Motor Speed ControllerOnly the above package content, other products are not included.Note: Light 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 +/- 1-3cm.