Welcome to the store! High Quality: Fits all types of general purpose DC motor speed regulation with brush. All types of car motors (car windshield wipers, car fan control cooling fan control, car air conditioning fan speed control motor speed). Production line conveyor belts, exhaust fan speed control, and treadmill motor speed control, multiple computers in parallel speed control, electronic fan speed control. All types of DC lights dimming, all types of DC heaters adjusting temperature, this speed controller is industrial quality, can work in freezing environments. Color: Black Material: Plastic + Metal Working Voltage: DC10V- DC 50V Current: 40A Output Power: 0.01-2000W (max) Recommended Usage Range: 12V 250W; 24V350W; 36V400W; 48V500W Quiescent Current: 0.025A PWM Adjustment Range: 5- PWM Frequency: 200hz PCB Size: 90x51mm (inches: 3.5inx2in) Case Size: 105x55x40mm (inches: 4inx2.2inx1.6in) Working Temperature: -40Celsius~+85Celsius (-40º F-185º F) Shipping Weight: 150g Main Use: Widely used for DIY, hobbies, scientific tests, such as controlling computer fan speed, controlling light bulbs, controlling motors, controlling Xbox360, HHO pulse width, test equipment, industrial automation, speed controller module boards support PLC, motor electric pump fan speed control, PWM HHO RC controller, remote control toys, etc...... Package Contents: 1* 40A DC Motor Speed Regulation Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm. Your satisfaction is our top priority. We will provide you with the best service. If you encounter any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!