Simply slip the Tag into the E-Z Mount and stick it to the windshield with the suction cups. No adhesive velcro necessary. The E-Z Mount easily removes for cleaning the windshield or when you just don't need it. Its large suction cups securely hold the tag in place...without using permanent adhesive strips. Easy On! Easy Off! Suitable for the following The E-Z Mount will only fit the Mark IV Transponder (see back of device). I stick it to my sunroof. Works just fine and it's out of sight.