Unlike other windshield tags on the market, the Metalcraft RFID Windshield Tag utilizes passive RFID technology offering a more economical option to the active windshield tags available. Encased between thin layers of polyester, the specialized inlay doesn’t require a standoff to read either through or on a glass windshield. This product provides a read range of approximately 18+ feet.* A tamper-evident option with strategically placed slits in the label and adhesive layers is also available at no additional cost.