This motor PWM speed controller features screw terminals for easy installation. Input voltage range: DC 6V60V. Compatible power supplies: 12V, 24V, 36V, 48V. Output current: 030A. Do not connect to 220V or 110V household AC power. LED display 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 (660V). Dimensions: speed controller: 13 x 6 x 3.2 cm (5.1 x 2.4 x 1.2 inches). Momentary switch: 4 x 1.8 cm (1.5 x 0.69 inches). Potentiometer: 23 x 20 mm (0.9 x 0.77 inches). Knob: 15.5 x 23.5 mm (0.6 x 1 inch), inner hole diameter: 6 mm. Equipped with 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: 0100%. Control frequency: 15 kHz. Wiring type: screw terminal. Potentiometer knob length: 18 cm. Net weight: 120 grams. Panel cutout dimensions: 92 mm x 56 mm. Speed display: digital percentage (0100%). Color: as shown. Material: ABS. Product 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. Notes: The digital display indicates speed as a percentage, not actual RPM. Ensure correct polarity when connecting input voltage. Do not apply household AC voltage (e.g., 220V or 110V). Input voltage must match the motors rated voltage (e.g., 12V motor requires 12V input, 36V motor requires 36V input). Package includes only the listed items. Color may vary slightly due to lighting and screen settings. Measurement tolerance: 13 cm.