This product reduces the car body static electricity by discharging, and so to reduces the dirt sticking to the car body and reduces the radio cacophony.It can be easily stuck to the top of the car or the trunk.Installation: please Install It to a place that can not be touched by the trunk.Please clean the place completely before installing.Take off the double-back tape cover, than stick the aero spoiler hard to the car.Note: it can reduce the static electricity on the car, but not that in human body.Do not take it off and re-stick it in 24 hours after installing.It will not work if it is stuck to glass or plastic.