This UV sterilizer box can be use to disinfect cellphones and keys as well as small objects like pacifiers, toys or even teething rings in only 3 minutes. Kills 99.9% of germs, bacteria, and viruses. No chemicals needed. Safe and clean.This disinfection box is FCC certified and FDA approved. It will stop if the cover is opened during operation for protection of the unit. It will also power off automatically after 15 hours in standby mode.