The system also options three user friendly buttons for guide screening and straightforward pairing modes. The smoke detector head can be swapped out for compatible Synergy+ heat detector heads which makes it straightforward to fulfill requirements. Make sure you Be aware, this solution is for indoor use only. FireCell is https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/