Perfect for use in depot's / control rooms / power plants.
Similar to WiFi as allows exceptionally long ranges available.
Full mesh system available with gateways to cover a whole premises.
Can reach fittings anywhere in the premises.
RF (Radio Frequency) Connectivity has the advantage of low cost, ease of installation and maintenance.
But they can only be used in situations where the distance between the remote and the central station is limited to a few hundred meters.
It is better than Bluetooth is terms of cost and distance. Requires to purchase default gateway separately from existing ones in the building.