Controlling smells with your smartphone
Media playback is unsupported on your device
Video

Controlling smells with your smartphone

A start-up develops a way to change how a room smells via an app and is showing off its gadget at this year's CES tech show.

A French start-up has developed a "smart" aromatherapy diffuser.

It is one of hundreds of app-controlled gadgets on show at this year's CES tech show in Las Vegas.

But is there really demand for smartphone-driven smells?

Read our CES 2017 preview