... protection Descriptions:SBA-131 Auto environmental perfume dispenser with Aromatic column Specifications:Operating without the use of batteries 5 colours for ... choice,blue,purple,green,pink,orange Refill:SBF-131 Aromatic column ,12 different kinds of perfum fragrances to meet your demand ... it also can use the convulsions system of elevator's fan to diffuse the perfum from outside to inside of the ...