Schneier - Hacking a Robot Vacuum

The Diqee 360 robotic vacuum cleaner can be turned into a surveillance device. The attack requires physical access to the device, so in the scheme of things it's not a big deal. But why in the world is the vacuum equipped with a microphone?

from Schneier on Security https://www.schneier.com/blog/archives/2018/07/hacking_a_robot.html