The cell phone-size Nano-UV disinfection scanner actually kills as much as 99% of bacteria on surfaces in just a few seconds.Using the same 253.7nm wavelength ultraviolet radiation that hospitals and water treatment plants use as a germicide, the Nano-UV is simply held right above surfaces to quickly disinfect them. A 10-second pass safely disinfects most surfaces, like keyboards, mice, toothbrushes, utensils or airline trays.