A hearing aid is an object which
measures air pressure.
A drill is a tool or machine that
stores the energy from arm movements.
A Tablet PC® is a small computer that
you use for making holes.
A satnav is a device which
you can read e-books on.
The ‘Wristband generator’ is an invention that
uses information from satellites to guide drivers.
A barometer is an instrument which
has a large touch screen and no keyboard.
A Kindle is an electrical device that
helps people to hear more clearly.