It has 3M advhesive on the back side. You can attach it to windows, metal, plastic and so much more. 

I've had clients put it on vehicles windows, 

vehicle metal components trunks/tailgates/fenders. 

I've had clients put it on Laptops, Desks, Hard Hats, Tool Boxes, Lamps, etc....

If you have any questions please let me know.