1,PWM stepless speed regulation, accurate control and low noise. 2,12-50V wide working voltage range, suitable for more occasion. 3,The recommended control power is within 12V250W, within 24V350W.. within 48V500W. 4,Simple wiring, convenient operation, easy to adjust and bring you convenience. 5,Made of material, safe and eco-friendly, stable and practical. Condition: Item Type: PWM DC Motor Speed Controller Material: aluminum alloy Model: CCM6DS Potentiometer: resistance value B100K opening 8mm or 0.3oz Control power: recommended within 12V250W, within 24V350W...48V500W. Rated current: 30A Speed adjustment range: 0 percent ‑ PWM frequency: 21kHz Size: Approx. 110 x 76 x 35mm or 4.3 x 3 x 1.4in 1 x PWM DC Motor Speed Controller Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.