Twist the Yellow dial to the right pressure then turn it on! It automatically stops when it's at the right pressure!
It's basically magic, but without the need to shout 'Expeli-tyre-mus', 'Inflatia Pneumaticus' or anything like that.
Automatic Car Tyre Pump - 12V (Lower Sunbury)
This offer has been gifted to someone and is no longer available.