Outdoor Message Board Cabinets are specially designed to withstand harsh weather conditions.  These message boards can store and display multiple messages in various formats and alternating displays of messages or photos.  There are two display configurations, the "Drop-In" can be inserted into existing signs or added to signs provided by others.  "Single-face" is a single one-sided display.  You can also use two single-face displays to show content on each side. http://www.daktronics.com