For pets' health and well-being, Petoneer has been developing and delivering products to give your furry friends the TLC they deserve. This UV Sanitizing Pen uses UV-C light to kill over 99% of bacteria in your pet's drinking water. UV-C radiation, with a wavelength ranging from 253.7 nm, attacks the vital DNA of the bacteria directly. The bacteria lose their reproduction capability and are destroyed. Even parasites, like Cryptosporidia or Giardia, which are extremely resistant to chemical disinfectants, are efficiently reduced. Powered by 2200mAh lithium battery, you can get peace of mind with 150 minutes' sterilization any time and anywhere!