Features: USB 5V three-speed switching extension cable for usb ceiling fans, 5v water pumps, usb desk fans, blowers, cooling fans, laptop fans. Convenient three-speed adjustment with integrated control switcher, 1-meter length This fan speed controller supports up to 5V 3A current, ensuring compatibility with various USB fans including desk fans, laptop coolers, and 5V blowers. This USB fan speed controller delivers personalizing comfort by enhancing device cooling capabilities. This easy-to-use USB fan speed controller keeps your electronics running cool and performing at their best. Specifications: The cable length is 100cm/39.37in This speed control cable does not have voltages boosting function and does not support data transmission. It has switching function and has three speed settings It supports 5V3A. It is suitable for various USB fans, computer cooling fans, and air-conditioned clothes. Package Includes: 1PC USB 3 speed speed adjustment cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution