Thanks for the help Matt! The '901' part numbers ship with Solo AP firmware that can run in Standalone mode,
or will join a ZoneDirector or SmartZone controller. The '9U1' AP part numbers are shipped with Unleashed code,
that will not connect to a ZD/SZ, but looks for a local Unleashed network, or can be used to setup one from it's
ConfigureMe.AABBCC ssid they broadcast. (See Unleashed Admin online docs) The price difference is due to
support entitlement differences. Controllers license number of APs per controller/cluster, and Unleashed support
is one license for up to 25 APs in the network. The -US00 at the end indicates United States FCC regulatory
compatible.