The USB-DC 3 level control cable, the ultimate solution for powering up your cooling fan jacket. This cable features a USB to DC connection, allowing you to easily connect your fan jacket to a power source. With 3 fan speeds setting, you can adjust the fan speed to your desired level, ensuring maximum comfort while wearing your work clothes. The cable is also compatible with 5V portable power banks with all types of interfaces in the market, providing you with a wide range of options for powering up your fan jacket. Featuring a long cable of 61CM, a short cable of 17CM, and a USB port of 35CM, this cable gives you the flexibility to move around while keeping your fan jacket powered up. Say goodbye to uncomfortable and stuffy work clothes, and stay cool and comfortable all day long with the USB-DC 3 level control cable.