A box of 12 units, 66.5*44.5*52 1. introduction of ultrasonic nebulizers, spray stability and long life 2. can join perfumes, air fresher, add white vinegar, sterilization and disinfection automatic protection function 3 lack of water, use a more secure, Turbo quiet mist fans, ultra-quiet design 4. set up and used for household, Office, commercial, industrial, medical, and so on