https://wccftech.com/apple-will-launch-ultra-wideband-equipped-airtag-before-the-end-of-this-year/

Apple is planning to launch its ultra-wideband based location tracking tags called "AirTag", by the third quarter of 2020, as per a new note by analyst Ming-Chi Kuo. AirTag was previously expected to launch in the fourth quarter of 2020, but the launch did not take place.

Universal Scientific Industrial, a manufacturing company in Shanghai, China, will be providing the system-in-package for the tags. This will be the circuit board which will contain Apple's ultra-wideband chip called U1. This chip is also used in iPhone 11 and iPhone 11 Pro, and allows users to share files via AirDrop by simply pointing their smartphones at each other.