Bluetooth beacon or Beacon tag supporting iBeacon and Eddystone is a battery-powered wireless device keeping repeatedly and securely transmits a continuous radio signal that other devices can observe.
RF-B-SR1 Beacon device is designed for broadcasting packets with RSSI, MAC address and other info you can self-defined. CR2477 coin battery makes it a longer life with a certain advertising interval.
The CC2540 Dongle iBeacon is a BLE 4.2 USB tag. No need for battery. It can be powered by the USB port of the computer, the laptop and any micro USB port. After power-on, it can advertise the iBeacon standard protocol. The beacon is mainly used for short-distance information marketing and indoor positioning services in shopping malls, bus stations, supermarkets and so on.