SmartSign 3M Engineer Grade Reflective Sign, Legend "Video Surveillance Silent Alarm Notifies Police" with Graphic, 18" high x 12" wide, Black/Red on White Legend "NO TRESPASSING THIS PROPERTY IS PROTECTED BY VIDEO SURVEILLANCE ALARM SYSTEM IN USE" Lyle signs supplies your sign with radius corners for safety; holes punched for post mounting Lyle Standard signs have a 7 year durability Lyle Signs produces signs that exceed industry standards and specifications The temperature range is -40 to 175 degrees F