Amazon Sidewalk

Amazon Sidewalk is a low-bandwidth long-range wireless communication protocol developed by Amazon It uses Bluetooth Low Energy (BLE) for short distance communication, and 900 MHz LoRa and other frequencies for longer distances.
History.
In September, 2019, Amazon announced the Amazon Sidewalk network and a domestic pet collar called Fetch (developed together with Tile) as the first device which would use the network. The network is composed of existing customers' echo smart speakers which act as the bridges between Sidewalk and the Internet.
In September 2020, Amazon started seeking hardware developers to partner and develop devices for the network.
In May 2021, Amazon and Tile announced plans to use Sidewalk to compete with the AirTag tracker device and associated location service from Apple.
As of May 2021, there are still no devices on the market that would use the network.
Amazon plans to launch the network on June 8, 2021.
Privacy concerns.
Amazon Echo devices have Sidewalk enabled by default and do not inform their owner about it. The feature can be disabled via the official app.
Technology.
Amazon Sidewalk amalgamates multiple physical layer wireless networking protocols and presents them into a single application layer they call "Sidewalk Application Layer".
Transmission technologies:
Devices.
The following devices support Amazon Sidewalk: