Had plenty instore in Reading was £29.99
12 V DC to 230 V AC. Allows you to use 230 V devices in cars, boats, caravans, etc. Notebooks, TVs or stereos can be plugged into the car 12 V cigarette lighter outlet. Max. load: 100 W. USB port (5 V max 1 A). No-load current: 0.2 A. Built-in overload and low-voltage protection. Modified sine wave. Size: 170x80x60 mm. Weight: 0.3 kg.
Designed to fit in car mug holders.
Plugs into cigarette lighter sockets