Use the Hanging Buyers Guide to assist you in complying with The Federal Trade Commission Used Car Rule that states: “All buyers guides must be posted prominently & conspicuously on or in the vehicle”. The hanging buyers guides help you avoid the mess of adhesive strips & are easy to remove for a test drive since they can hang from the rear view mirror. You can still use these guides to affix to a window by removing the adhesive strips if you choose to do so.