Microsoft offers guide headset for blind people
A headset that talks visually impaired people around cities has been designed by Microsoft.
It works with a Windows phone and uses location and navigation data with a network of information beacons in urban locations to describe routes.
Charity Guide Dogs, which helped develop the technology, said it could help improve lives.
However, some experts have questioned how realistic the technology will be to roll out widely if it is to rely on a network of beacons attached to street furniture.
Rory Cellan-Jones put the technology to the test with Chris Yates of the charity Guide Dogs.