The maximum range of beacons is around 70 meters (230 feet). It can be also adjusted in 7 different levels. However this depend on several external factors of specific location. Beacon signal can be limited by physical obstacles and scale of it depends on material and size of it. Also other radio signals may cause some interferences to Beacon broadcasting.
Out of the box, Kontakt.io Beacons have Transmission Power set to give a range of 20 metres or less depending on location which works well for many applications. You can adjust it to your needs easily, using our Mobile app or Web Panel.