This motor speed controller features original low internal resistance MOSFETs and a pre-driver stage for improved and stable performance, supporting high current and high frequency operation. It includes a start-stop button and can be controlled via an external switch to meet various customer control requirements. The controller allows setting of minimum value, maximum value, and working frequency, enabling users to customize operation based on their motor or LED characteristics. The minimum value setting ensures the motor starts or lights turn on reliably, while the maximum value prevents motors from running too fast or LEDs from overdriving at full display. Equipped with a digital encoder knob, this speed controller offers higher precision, better consistency, and no drift compared to standard potentiometers, allowing accurate adjustment to desired values. The adjustment step value can be set from 01 to 25, supporting both fine and coarse control. Start and stop times are adjustable from 00 to 99 seconds, with soft start functionality to eliminate inrush current, effectively protecting the motor and extending its lifespan. Housed in a standard 5135 instrument case with back cover, the PWM motor speed controller is easy to install. Material: ABS + Electronic Components Color: Black Package Contents: 1 x Motor Speed Controller Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerances are +/- 1-3 cm.