Description: It’s a PWM speed controller so it enables you to control the speed of these little DC brush motors smoothly. It’s ideal for applications like fans, etc. providing nice adjustment of motor speed instead of the more usual “High-Low” switching Features: Wide range of operating voltage: 12V(72W), 24V(192W), 36V, 60V(480W) A good speed controller for DC brush motors High-frequency capacitance, power tube and 10A fuse are used in the module Adopts sealed and high-quality potentiometer with switch, stable performance Metal case creates better durability; high efficiency and low noise Suitable for applications like fans, etc. providing nice adjustment of motor speed Specifications: Operating Voltage: DC 10-60V Rated Current: 8A Max. Current: 10A Control Power: Max. 480W Speed Control Range: 0% -100% PWM Frequency: 21KHz Size: 7.2×3.9x3cm/2.83×1.54×1.18inch Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!