Wall-mounted UV germicidal lamp uses 110V AC, it can automatically detect moving objects and shut off to avoid radiate on people. The functional sterilize range is 2.5-meter radii from the source. It fits for a public region such as a waiting room, receptions, etc., while most people lack their UV quarantine® device with mounted UV (mode A, C). However, if everyone inside the public region wearing such a device, then it will not be necessary.