Features: Three adjustable gears for selecting low, medium, and high speeds. This product is 2core device that only supports power supply and not support data transmission. The USB speed control line with Switches for those who want to adjust the speed and brightness of their 5V products such as USB fans, USB desktop fans, and USB lights. The USB speed control line with Switches plastic that ensures durability and longevitys. The USB speed control line with Switches for both indoor and outdoor use. Specifications: Materials: ABS Line length: 35cm Package Includes: 1PC USB Cable with Switches note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differenceS between different monitors, the picture may not reflect the actual of the item. Thank you!