A:Answer It uses Zigbee. According to their own site, version 3.0 of the Zigbee protocol. I'm fairly certain it also works as a repeater to propagate the Zigbee signals to devices further from the Zigbee hub. Mine have been working very well with my Samsung SmartThings WiFi system, though, for some reason they get reported to Google Assistant as 'lights' rather than 'plugs', so I I've had to get creating in my room assignments, and avoiding phases like "all the lights".
