The idea of a multi-use sanitizing flashlight in a small package was appealing to me just to keep in my vehicle, just in case. When it arrived I was extremely impressed with the quality construction and design. Very sturdy, I charged it up and it seems to work very well.
The sanitizer aspect of the wand is pretty small and unobtrusive to the function of the flashlight and it doesn't inhibit keeping the flashlight my jeans pocket, or in a jacket pocket.
I am not a scientist, but I know UVC works well to kill germs and viruses. I cannot attest to how long the light has to be exposed to the surface, so I just do a few minutes and hope for the best. The flashlight and UVC lasts a long time. It is strongly advised that you do not look at the UVC at any point.