Ring

Amazon unveils flying Ring security drone and Luna games service

It is designed to activate only when residents are out, works indoors, and is limited to one floor of a building.

The firm also unveiled an online games-streaming service and a voice-activated screen that swivels about.

But one campaign group described the drone camera as Amazon's "most chilling home surveillance product" yet.

"It's difficult to imagine why Amazon thinks anyone wants flying internet cameras linked up to a data-gathering company in the privacy of their own home," said Silkie Carlo from Big Brother Watch.