Size: 60x90x99mm/2.36x3.54x3.9in (LxWxH), the DC motor speed controller is small in size, installation size: 52x81mm/2.05x3.19in, convenient compatible with installation in narrow spaces; turn control and stop Soft start protection: The motor controller has a soft start protection function, which can effectively reduce the surge current, protect the motor and prolong the life Function: The DC motor speed control switch can feed back the slip energy generated during speed control. Efficient, effectively improve energy utilization and efficiency. Application range: Widely used in industrial DC motor speed regulation, DC fans, packaging, printing, electronics, instrumentation, clothing machinery, medical-machinery and other industries Input voltage: DC 12-60V Output current: 20A Continuous current: 12A PWM pulse width adjustable range: 0% to 100% Colour: As Shown Material: plastic Package Contents: 2 x Speed Controller Only the above package content, other products are not included. Note: Light reflection 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.