It’s not compatible with smartthings, but you can use an Alexa routine if you just want to turn it on and off from smartthings. But you have to use a virtual device which is a virtual sensor, not just a switch. Alexa can see a virtual switch, but you can’t use those to trigger a routine.
You shouldn’t need a hub to make this work. (And connect was the original name for what is now the current “smartthings“ app. 
)
See the community FAQ: