The device also attributes 3 simple to use buttons for handbook tests and straightforward pairing modes. The smoke detector head could be swapped out for suitable Synergy+ heat detector heads which makes it very easy to meet up with prerequisites. Please Note, this item is for indoor use only. Underneath, https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/