The Simplex 49VO-WWA-A is a visual signaling appliance typically used in fire alarm systems. It’s designed to provide a visual indication of an alarm condition, making it suitable for areas where audible alarms might not be effective or allowed, such as in hospitals or libraries. The ’49’ series indicates it’s a strobe light, ‘VO’ signifies it’s a xenon strobe, and ‘WWA’ stands for ‘Wall Mount, Weatherproof, and Amber Lens’. So essentially, it’s a wall-mounted, weatherproof strobe light with an amber lens. When triggered by the fire alarm system, it emits a bright flashing light to alert occupants to the emergency situation. Hope this helps clarify its functionality!