MonaLisa Arduino Shield and Battery Powered Standalone for remote/probe-based temperature sensing (among other things)
He sells on Ebay; use "MonaLisa Zigbee" as a search term.
Arduino Shield-based:
https://www.ebay.com/itm/285029073913
Standalone Battery Powered:
https://www.ebay.com/itm/284992778034
Google Doc Manual:
https://docs.google.com/document/d/1YbGH5Dl3OhkTz4v1ul0Xy4Tzc7oBAwip61Rvk_t6WTA/edit#heading=h.w5x22opo2rza
Thread about its creation/drivers here:
https://community.hubitat.com/t/battery-powered-monalisa-firmware-for-makers-and-custom-devices/69674