Sometimes called radio fire alarms, these units utilise radio frequencies to manage all phone points, detectors, and alarm sounders. Without any wires required, the time it requires to setup a wireless system is considerably minimized, as opposed to standard fire alarm programs. Around 126 wireless addresses on a single loop, https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/