Dafensoy USB to DC Adapter, 2.0 USB A Male to DC 5.5×2.1mm Male Power Adapter 2-pack, Used for Charging Electronic Devices With DC or USB Ports.resistant and durable, and effectively protects the internal chip. USB interface output is generally 5V voltage, 12v voltage cannot be used Port 1: 2.0 USB A male plug, 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, Bluetooth speakers and other small electronic devices