Dorgard Fire Door Retainers by Fireco
Dorgard is a complete wireless solution to legally holding open your fire doors as it is a battery operated self-contained device. The Dorgard constantly listens for a sound above 65 db. Once the fire alarm sounds, the Dorgard will pick up the noise and after approximately 14 seconds, the Dorgard will release the fire door. The Dorgard is also capable of automatically releasing doors at night for maximum protection.