PHIYANG UV Room sterilizer FY-30FS,has 4 pieces of 30 watts OR 55 watts UV lamps that emit a high intensity ultraviolet light that hits every surface in the room and kills any micro organisms or pathogen including MRSA, hand foot mouth disease,colds and flu,pneumonia,molds,e.coli, salmonella and similar type bacteria. The light penetrates and destroys the actual DNA of micro organisms. There is no known micro organism that is immune to UV-C energy. UV Room Sterilizer disinfects approximately up to 60 square meters room area. There are numerous safety features bulit with a 0-120 mins timer and motion sensor.