Fluke Connect tools and the older Fluke CNX tools are both capable of wireless communication, but they use different radio systems and are not compatible with each other.
The new gray pc3000 FC adapter (PN 4401602) is listed in the sales app as a replacement for the old yellow CNX pc3000 adapter (PN 4200883). They are NOT compatible with each other, this only means the 3000 FC series of products are the overall replacements for the CNX series of products in general.
Fluke no longer provides technical support for the CNX tools.