Operates at a minimum voltage of DC21.0V, ensuring reliable performance for various applications. Equipped with a PWM control feature via the thin red wire, allowing for maximum speed operation when connected to a +5V board. Includes an LED indicator light connected through the thin black wire, providing visual feedback during operation. Designed with two thick wires for , ensuring robust and secure electrical connections. Comes with a built-in drive board, enhancing ease of use and installation while preventing reverse polarity damage. This brushless worm gear fan is engineered for high efficiency and durability. It features a robust design with thick power wires for secure connections and includes a PWM control for speed adjustments. The LED indicator light offers operational visibility, making it suitable for various applications. Please correct polarity during installation to avoid damage to board. Color: Black & Silver Material: Metal Package Contents: 1* Vacuum Cleaner Fan Motor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.