One minute to disinfect to a 99.9% kill of common hospital and classroom viruses and bacteria. Fully enclosed disinfection chamber (no UVC exposure to user). Bulbs are arranged to provide complete 360 degrees of irradiance. Bulbs are easy to replace and are rated for 11,000 hours Disinfects tablets, Chromebooks and other devices. (Chromebooks can be disinfected while open). Large chamber also fits VR headsets, headphones, robotics and other items. Includes 12 medical grade testing cards to check effective germicidal level of UVC and mounting hardware to secure tub to a surface. 12-1/2"W x 16-1/4"D x 13"H. Lifetime warranty on tub components, 1-year warranty on UV bulbs and electrical components.