Fusion is comparable for the loop module, sharing the same technology, and In addition it supports as many as 31 wireless units. The amount of Fusion interfaces, depends upon the user interface being used, but a phone to EMS support will provide you with more facts. Suitable documentation of inspections https://www.thesafetycentre.co.uk/blog/ems-wireless-firecell-systems-from-the-safety-centre/