This dc motor speed controller is made of , which can withstand use. Features the aluminum alloy and PCB material, which has high durability, not easy to deform. Fine workmanship, ensures practicality. This dc motor speed controller will make adjusting output easier and smoother. Features -Color:Multi -Material:Aluminum alloy, PCB -Size:8.50X5.80X3.80cm/3.34X2.28X1.49in Voltage input: 9-60V Output current: 20A PWM frequency: 15kHz - Pulse width modulation with variable voltage input range has the advantage of making full use of the energy of the power supply, and the circuit is efficient. - Speed Control Knob: The motor speed control has a knob with function. Easy to use, it can be directly connected to the motor, and can control the motor speed from 0% to full speed. - This aluminum shell adjustable PWM motor speed controller uses high-voltage MOS tubes, triple-voltage high-frequency low-resistance capacitors, and automotive . - The parameters are accurate, not easy to generate heat, and easy to replace. Suitable for DC brushed motors. - Every detail is carefully crafted, experience the high durability and practicality. Package list: 1 x Dc Motor Speed Controller