I sent a question to the manufacturer above and got this response.
Hi Bob, the ClickSmart+ devices do work on Zigbee 3.0 protocol. However, we do not have the software built into the devices to enable communication to different manufactures devices. So at this stage the protocol is a proprietary version of zigbee 3.0.
ClickSmart+ software interface isn’t designed to speak with any other hubs directly. While there may well be bridges built in the future which will enable more compatibility with other devices, such as the Smart Things Hub, at this time you will still need the Universal Hub (CSP010) to pair to and talk directly to each ClickSmart+ device in a home.
