Fangrui Product Details Fangrui Product Details Fangrui Product Details This Motor Speed Controller Allows The Direction Of A Dc Motor To Be Controlled Using A Pulse Width Modulated (pwm) Dc Voltage. With A Back-up Fuse, It Can Automatically Break The Connection And Restore It Automatically. With An Led Indicator And A Rotary Switch, Convenient To Use. Suitable For Many Electrical Devices. It Is A Practical Module For Controlling Dc Motor Speed. Color:green With An Led Indicator And A Rotary Switch, Convenient To Use. Material: Pcb Power, Output: Max.2a Input Voltage: Dc1.8v,3v ,5v,6v,12v Item Size: 3 * 5.5 * 1cm / 1.2 * 2.2 * 0.4in Item Weight: 14g / 0.5oz Package List: 1 * Pwm Motor Speed Adjuster Module 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 +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.