EFR32MG24X + Si4468 Dual-PHY (BRD4197)
https://csa-iot.org/csa_product/efr32mg24x-si4468-dual-phy-brd4197-7/
EFR32MG24X is a flexible, high performance, low power Zigbee Compliant Platform from Silicon Labs. The EFR32MG24x family has up to 1.5MB Flash and 256 kb RAM.