Ultra Violet (UV) Light is invisible to human eyes. It can be subdivided into three categories: UVA, UVB and UVC. The wavelength of UV-A from 315 to 400 nm, UV-B from 280 to 315 nm and UV-C from 100 to 280 nm. Our Handheld Portable Ultra Violet Sterilizer has been found to be an extremely effective device and can kill over 99.9% of the DNA or RNA of bacteria, virus, germs and micro organism in an extremely short amount of time of 10-20 seconds with a distance of 5cm. The wavelength of this UV Sterilizer is in between 260 - 280 nm which is sufficient for killing microorganisms. It can also be used on objects like Digital surface, Kitchen surfaces & utensils, Personal items, Bathroom fixtures, Children & Baby items. It is CE & FDA approved, ROHS complaint and the highest accuracy product. 100% hygienic and easy to use. It may be used to reduce cross-contamination risk and minimize the risk of spreading disease. It has a tilt sensor that automatically gets off when it is pointed upwards when in on condition this has been provided to protect your eyes and skin from accidental exposure.