2RU BOX OFFICE sign mounts in standard 19" rack.Our unique LED schematic and twin-lens design provides even illumination across the entire sign panel with no hot spots or dim edges. Illumination is bright when the light is on, providing a crisp, clean and visibly appealing sign. When the sign is off, the lens panel is virtually blacked-out. For use in professional recording & broadcast studios, home studios, school, auditoriums & theaters. These illuminated signs use high-efficiency LED lights for years of dependable service.Easy to install in just minutes and includes UL Listed power supply. Additional flash module and 4 button contorller is also available. LED lights are rated up to 50,000 hours of use life. Size - 19" (L) x 3.5" (H) x 2.5"(D)The facility name or call letters can be added on for $50.00. Call us for details!