Passive fire protection construction components are utilized to resist, retard and isolate flames as well as associated smoke and fumes: they don't in themselves extinguish flames therefore They're classed as 'passive protection'. The panel is always on to observe the standing on the method and can alert of low battery, https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/