Features: brand new and high quality Can use PWM control. It can carry a maximum current of 40A, with a peak-to-peak value of 60A. Wide power supply control signal 10-55V. Stable performance. Small size. Specifications: Input voltage: DC10-55V (equal to the rated voltage of the motor) Output voltage: linear under load Maximum current: 60A Continuous current: 40A Speed regulation type: current regulation speed regulation mode: potentiometer (linear) Support motor: DC brush motor Forward rotation reverse: Support Speed range: 0--100% Control frequency: 15KHZ Wiring type: terminal Knob specification: 100K (with switch) Wiring type: fence terminal block Size: approx. 90x86mm/3.54x3.39in Package Includes: 1 x PWM DC Motor Speed Controller note: No retail package. Please allow 0-1cm error due to manual measurement. please 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!