Battery Backup
Products with battery backup contain a battery so in the case of a power outage the lights or signs with stay illuminated for roughly 90 minutes.
Vandal Resistant
Products that are designed to be installed in a location (or devices) where they may be subject to vandalism.
Red Letter
New York City and Chicago require exit signs to have red letters
White
Most product that have white housing color are made of a thermoplastic material.
Black
Most product that have black housing color are made of a thermoplastic material.
