Dafensoy USB to DC Adapter, 2.0 USB A Female to DC 5.5×2.1mm Male Power Adapter 2-pack, Used for Charging Electronic Devices With DC or USB Ports.USB interface output is generally 5V voltage, 12v voltage cannot be used Port 1: 2.0 USB A female jack, Port 2: DC male plug 5.5×2.1mm We provide 8 kinds of DC connector sizes for you to choose, please pay attention to the product size classification when purchasing. Used for charging devices with USB A 2.0 ports or small DC ports, such as mobile phones, wireless routers, desk lamps, headlights,