Air vent was in working order but was taken down later. No original packaging or instruction provided.
!!! The Heat alarm is supposed to be connected to the mains BUT its battery exp date is until July 2025 (!!!) - I dont know if you can swap the battery but please check before installing for your own safety.
Air vent (no timer) and heat alarm (july 25) (Bromley BR2)
This offer has been gifted to someone and is no longer available.