The unit also capabilities 3 user friendly buttons for handbook tests and straightforward pairing modes. The smoke detector head may be swapped out for compatible Synergy+ heat detector heads which makes it very easy to fulfill requirements. Please Be aware, this merchandise is for indoor use only. Wired programs are https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/