The UV-Pro222 B2 is a far-UVC disinfection device that uses a 222nm wavelength of light to inactivate viruses and bacteria. It’s designed for use in occupied spaces, as the 222nm wavelength is considered safe for humans as it doesn’t penetrate the outer layer of skin or eyes. The B2 model is a variant, potentially differing in features or specifications from the B1 model, but both utilize the same 222nm far-UVC technology.