Fusion is similar towards the loop module, sharing exactly the same technologies, and it also supports nearly 31 wireless units. The amount of Fusion interfaces, relies on the user interface being used, but a simply call to EMS help offers you additional information. Wireless fire alarms are a sensible choice https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/