Sound activated. Responds to fire alarms, releasing the door in the event of a fire. Wire-free, for easy retrofitting to any door. Intelligent release feature can be programmed to react to a particular fire alarm sound, significantly reducing false activations....

Sound activated. Responds to fire alarms, releasing the door in the event of a fire. Wire-free, for easy retrofitting to any door. Intelligent release feature can be programmed to react to a particular fire alarm sound, significantly reducing false activations....

Sound-activated, wireless fire door holder automatically releases when the fire alarm sounds, preventing the spread of smoke and fire. Integral ‘Dual Mode’ uses 'listen and learn' technology to learn the sound of a fire alarm which helps prevent...