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Fireco 943-3945 Dorgard SmartSound Door Holder in White
Hoyles Dgss-WH Dorgard SmartSound White Fire Door Retainer. Dorgard SmartSound is a wireless solution for legally holding open fire doors, automatically releasing them to close when a fire alarm sounds. SmartSound technology means the door units are not triggered by the noise of a vacuum cleaner. SmartSound listening technology means Dorgard SmartSound knows the sound of your alarm straight out of the box. As soon as alarm is activated, the plunger is released and the door will close.
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Fireco 728-7133 Dorgard SmartSound Black
Hoyles Dgss-BL Dorgard SmartSound Black Fire Door Retainer. Dorgard SmartSound is a wireless solution for legally holding open fire doors, automatically releasing them to close when a fire alarm sounds. SmartSound technology means the door units are not triggered by the noise of a vacuum cleaner. SmartSound listening technology means Dorgard SmartSound knows the sound of your alarm straight out of the box. As soon as alarm is activated, the plunger is released and the door will close.