This unique air care system utilizes hydrogen fuel cell technology to operate! It requires no batteries and refill com ponents are completely recyclable. Refill formulas contain no propellantsor VOCs - only pure fragrance and odor neutralizers. Decorative, discreet dispenser installs in one minute, has no moving parts, is noise free and has high or low settings for 60 or 90 days of refill life. Dispenser mounts on wall or you can set it on horizontal surfaces for offices, ect. Powerful, customer-proven, preferred fragrances deliver a consistant level of fragrance throughout refill life. All refill fragrances contain Microtrans (odor neutralizer) to break down and eliminate odors. SMARTCell is the perfect environmental solution to malodor problems. dispensers are 3 inches W X 5.5 inches H X 275 inches D. 6 refills per case.