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). Speed controller dimensions: 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, delivering stable and reliable performance. Speed control type: potentiometer Speed range: 0–100% Control frequency: 15kHz Wiring type: screw terminal block Knob length: 18 cm Product net weight: 120 grams Panel cutout dimensions: 92 mm x 56 mm Display type: digital percentage (0–100%) Color: as shown in image Material: ABS plastic Unit size: 95 x 60 x 33.8 mm Package contents: 1 x Speed controller 1 x Momentary start/stop switch 1 x Potentiometer 1 x Knob Notes: - The digital display indicates speed as a percentage, not actual RPM. - Ensure correct polarity when connecting input power. - Do not apply AC mains voltage (e.g., 220V or 110V) to the controller. - Input voltage must match the motor’s rated voltage within the 6–60V range (e.g., 12V motor requires 12V input, 36V motor requires 36V input). - Package includes only the listed items; other accessories are not included. - Colors may vary slightly due to lighting and screen settings. - Allowable measurement tolerance: ±1–3 cm.