The Feasycom Sensor Beacon FSC-BP121 is an IP66 waterproof Bluetooth 5.1 temperature and humidity sensor beacon. It enables real-time monitoring of environmental temperature and humidity near the beacon, with a battery life of up to 280 days. Additionally, it serves as a Bluetooth beacon supporting iBeacon, Eddystone, and AltBeacon profiles. Users can easily configure broadcast data, interval, and transmit power using the FeasyBeacon app. With the free FeasyBeacon SDK, users can develop their own applications effortlessly.