... adsorption of formaldehyde, benzenes, ammonia, radon and other harmful gases and bacterioplankton in the air and at the same time ... of formaldehyde, benzene, xylene, ammonia, radon and other harmful gases indoors. Meanwhile it owns of removing away of mildew smell ... 40%. 3, Longer-lastingIndoor formaldehyde, benzene and other harmful gases act as the home life inevitably invisible killer and threaten ...