This motor PWM speed controller features screw terminals for easy installation. Input voltage range: DC 6V to DC 60V. Compatible power supplies: 12V, 24V, 36V, 48V. Output current: 0-30A. Do not connect to 220V or 110V household AC power. Equipped with an LED display that shows the percentage of actual speed relative to maximum speed, allowing clear and precise readings. Input voltage must match the rated voltage of the DC motor (6-60V). Dimensions of the speed controller: 13 x 6 x 3.2 cm (5.1 x 2.4 x 1.2 inches). Button switch size: 4 x 1.8 cm (1.5 x 0.7 inches). Potentiometer size: 23 x 20 mm (0.9 x 0.77 inches). Knob size: 15.5 x 23.5 mm (0.6 x 1 inch), inner hole diameter: 6 mm. Includes a momentary start/stop switch, speed control potentiometer, and knob for smooth, stepless variable speed adjustment, ensuring stable performance. Speed control type: potentiometer. Speed range: 0–100%. Control frequency: 15kHz. Wiring type: screw terminal block. Potentiometer shaft length: 18 cm. Product net weight: 120 grams. Panel cutout dimensions: 92 mm x 56 mm. Speed indication: digital percentage display (0–100%). Color: as shown. Material: ABS. Unit size: 95 x 60 x 33.8 mm. Package includes: 1 x speed controller, 1 x momentary start/stop switch, 1 x potentiometer, 1 x knob. Note: The digital display indicates speed as a percentage, not actual RPM. Ensure correct polarity when connecting input voltage. Do not apply household AC voltage. Input voltage must match the motor’s rated voltage (e.g., 12V motor requires 12V input, 36V motor requires 36V input). Content listed is all that is included; other items are not part of the package. Due to lighting and display differences, colors may vary slightly. Measurement tolerance: ±1–3 cm.