This UV sterilizer kills 99.9% of bacteria and germs. You just connect the included USB cord, zip up the bag, push the button for 1 to 3 minutes and the UV light does the job. It does not harm any objects. You can sterilize your phone, keys, glasses, jewelry, earbuds, watches etc. without harm. It is great to use for baby items like bottles and cups, clothes, toys, teething rings and pacifiers. Also great for children's toys. You can sterilize anything that fits. sanitize, for babies, for children, for adults, sterilize items, kills germs, kills bacteria, UV Sanitize, cleaner