Synbio® Air Guard ultrasonic mister and diffusing system was developed to treat ALL surfaces permanently with the Synbio® technology. Through ultrasound vibrations synbiotically charged water particles are being generated of just 1µm (1/1000 of a millimeter!). This produces a very fine synbiotic mist that distributes quickly though the air and all indoor spaces. Through this mist the probiotics and prebiotics are placed on all surfaces in the room. Fogger for Synbiotics. Comes with one refill inside the box.