Function: Converts 5V input (from a power bank or USB port) into a stable 9V or 12V DC output.Common Use: Powering Wi-Fi routers, optical modems, or small electronic devices during a power outage.Specifications: Typically features a 1A max output and a 100 cm (1-meter) cable length with a standard 5.5mm x 2.1mm DC barrel plug.If you'd like,