DKS offers a full line of Proximity Card Readers in different mounting styles to meet your exact needs. The Readers are sealed in epoxy, making them vandal-resistant and are ideal for both indoor and outdoor applications. AVI (or Automated Vehicle ID) Systems operate in the same manner as Proximity Card Systems, but with longer ranges - up to 25 feet. A typical AVI System places a tag on the vehicle, rather than having the user carry it. In this manner, a gate System will open automatically as the vehicle approaches with a properly credentialed tag.