ARRONE Dorgard retaining device:
- Holds open fire doors and automatically closes the door when the fire alarm sounds
- Material: ABS
- Power 2 x 1.5 VC size alkaline batteries
- Trigger by alarms compliant with BS 5839-3
- Complies with BS EN 1155:1997 and is accepted by the Fire and Rescue Services
- EN 61000-6-1:2001
- EN 61000-6-3:2001 +A11:2004
- BS 7273-4 Category C
- USA patent number 5525963
- European patent number 0635092

