Two Countdown Timer Modes for Auto-turn Off and On in 1 Hour / 2 Hours Mode. Certificate(s): CE, RoHS, FDA. ... has been tested in both medical and industrial settings, and has proven successful at eliminating odors and impurities caused by chemicals, viruses, and bacteria. UV Light ... /60 Hz,·Two countdown timer modes for auto-turn off and on in 1 hour / 2 hours mode.·Certificate(s): CE, RoHS, FDA ...