Union DoorSense Acoustic Release Hold Open Unit (UNI-J-8755A-BLACK) Hikvision Intercom Systems Longer battery life 3-5 years

Longer battery life 3-5 years in typical use (depending on battery type)

Port Security

the Union DoorSense releases an open door when the fire alarm sounds

Premier Elite Series Compatible

265+ compression improves encoding efficiency by up to 50% & reduces data storage costs

Union DoorSense Acoustic Release Hold Open Unit (UNI-J-8755A-BLACK) Hikvision Intercom Systems Longer battery life 3-5 yearsThe UNION DoorSense is designed to hold your fire doors open, improving access around your building. If the fire alarm sounds, DoorSense automatically releases to let the door close, when used in conjunction with a standard door closer. Unlike a door wedge, the Union DoorSense releases an open door when the fire alarm sounds, allowing it to be closed. They are ideal for any large or small applications where fire doors are installed including care