Thanks for your question. Yes, all SmartThings sensors and devices need the corresponding SmartThings v3 Hub and the newest version of the SmartThings App. Once the Hub is setup and installed, you can then add the Outlet as a new device. From there you can pair with Alexa. You can find those instructions and much more on our SmartThings website -- https://support.smartthings.com/hc/en-us/articles/205275404-How-to-connect-Amazon-Alexa-with-SmartThings
~Samsung Brand Ambassador