How does UV-C kill microorganisms? 

UV-C destroys the DNA of germs and pathogens when emitted at a wavelength of 253.7 nanometers. Once the DNA is broken, it loses it's ability to reproduce and the bacteria or virus itself is rendered harmless. 

Is UV-C safe? 

While UV-C has a significantly lower penetrating ability than UV-A or UV-B, overexposure can temporarily irritate the eye. However, to prevent this from happening all Tru-D SmartUVC™ units are equipped with automatic shut-offs. This means if a person enters a room that's being disinfected with Tru-D, the machine will switch off and the person will receive no exposure.

How does UV-C work for surface disinfection?

When you use a portable UV-C light, like Tru-D, you simply roll the machine into a room. Because Tru-D is automated and remotely operated, you turn it on once you shut the door. From there, Tru-D self-adjusts to the size and content dynamics of the space to deliver the ideal dose of germicidal UV light to the space.