Yes, the range is limited (up to a maximum of 400 nominal meters regard bluetooth technology and up to a maximum of 250 nominal meters in the case of WiFi technology, in the latter case you can increase the range with repeaters, but under no circumstances can increase the signal if you want to stay within the parameters set by International regulations). Anyway, the name of Proximity marketing refers precisely to the fact that the recipient of the service is in the vicinity of the supplier. In this way those who use the service “sees” who provides it, and are driven to get closer.