RadBeacon E4 is an all-weather, long-life Bluetooth Smart proximity multi-beacon using iBeacon, AltBeacon, and Eddystone technology, including Physical Web. The RadBeacon E4 provides seamless proximity services for both iOS and Android mobile devices. Ruggedized and weatherproof, the RadBeacon E4 gets maximum battery life from 4 user-replaceable AA batteries and can be flexibly installed in any location, regardless of available power.