Every Raspberry Pi computer since Raspberry Pi 3B+ has been a “module” from a conformance perspective: because we isolate the radio frequency components under a shield can, you can build your own wireless-enabled product around ours without having to re-certify the radio, saving tens of thousands of dollars.

Today we’re building on that heritage with our first standalone Wi-Fi and Bluetooth radio module. Priced at just $4, Raspberry Pi Radio Module 2 packages the same Infineon CYW43439 radio used on Raspberry Pi Pico W and Pico 2 W, and is an ideal choice for RP2040– and RP2350-based products that require turnkey wireless connectivity.

...read more at raspberrypi.com