In and outovation

Shoes made for tarts workers in the sex industry which include an alarm that can be set off if all is not right. A senior politician is required for an important vote, for example, or a senior policeman is required at the scene of yet another puzzling murder. Not Jane Tennison, obviously.

It also tracks your position, though I suspect that's more to do with GPS than "hanging over back of sofa with thighs up wallpaper" sort of position data, IYSWIM.

Here is the shoe. Sources confirm it has an accomplice.