Features: It is suitable for speed regulation of 5V desk fan, table fan, camping fan, blowers, etc. With switch function, the speed of high, medium and low 3-gear can be adjusted. Only suitable for USB-powered product, if product is rechargeable, this cable can only use on/off switch function. USB male to female, only supports for power-supply, can not transfer data. Made of pquality plastic material, strong toughness and pull-resistant, not easy to break, flexiable to use. Package Includes: 1 Piece USB Speed Controller Line Specifications: Main Material: Plastic Cable Length: Approx. 130cm/4.26ft Connectors: USB male to female note: Please allow 0-1cm error due to manual measurement, make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.