The Raspberry Pi Compute Module 4 Antenna Kit has undergone extensive compliance testing and meets the standards required in many countries. You can find all compliance information and regional certificates at pip.raspberrypi.com.
Obsolescence Statement
Compute Module 4 Antenna Kit will remain in production until at least January 2028
Exposing every interface from Raspberry Pi Compute Module 4, the Compute Module 4 IO Board provides a development platform and reference base-board design for our most powerful Compute Module yet. ...