Bluetooth Beacons are small transmitters that are permanently sending a signal in a distance from a few inches/centimeters (close), to a few foot/meters (near) and up to 70 meters (far) to all devices that are listening for such a signal. These devices work with Apple’s iBeaconâ„¢ and/or Google’s Eddystone protocol, depending on the producer and after-deployment settings.Â