The Vevor HVAC air purifier is a whole-house in-duct UV-C purification system designed to improve air quality in HVAC systems. It uses dual 36W bulbs with a 254 nm wavelength to help treat duct surfaces and support cleaner air throughout spaces up to 2,400 sq. ft. The unit features mechanical switch control, an LED status indicator, and a 4.92' power cord for flexible installation. Two spare bulbs are included to extend service life, and the kit comes with accessories for straightforward setup.