[Professional-Grade 22mm Metal Switch with Plug-and-Play Pin Harness]: This 22mm LED ring illuminated metal switch features a durable zinc-aluminum alloy housing and comes with a complete, ready-to-use harness terminated in standard pins for a true plug-and-play solution. Its non-polarized wiring (no positive/negative distinction) and clear instructions enable both professionals and DIYers to achieve quick, reliable installation in 12-24V systems.