https://www.cnet.com/news/this-scent-machine-works-with-alexa-because-even-smells-are-smart/

No product is safe from the onslaught of technology -- even the candles, oils and diffuser you deploy to keep your house smelling like an autumnal forest. A scent machine called Moodo aims to smarten up your home's aroma with Wi-Fi-connectivity and integration with Alexa, Amazon's voice-activated assistant. The $189 Moodo (roughly £140/AU$240) will be on display at the CES trade show next week in Las Vegas.

The Moodo's scents come from a group of four pods, called "scent families," that are filled with scented beads that last for 60 hours of continual use. You have a few options to create the smellscape of your fantasies: You can change the intensity of each pod through the companion app, ask Alexa (if you have an Alexa-enabled device) or select the shuffle mode that automatically adjust the levels to prevent you from becoming "nose blind," according to Moodo.