This is European Mapping, rather than the standard UK Mapping. The standard UK Mapping typically costs £50 upwards so this looks a cracking bargain to me.
This excellent Sat Nav provides comprehensive mapping of Western European countries including France, United Kingdom and Ireland, Germany, Austria, Switzerland, Andorra, Spain, Italy, Russia, Turkey, Finland, Norway, Sweden, San Marino, Belgium, Denmark, Liechtenstein, Luxemburg, Netherlands, Portugal, Switzerland and Vatican City
Model Number 3218
Screen Size (inch) 3.5
Touch Screen Yes
Spoken Instructions Yes
PC Link Possible USB link
Dimensions (WxDxH in cm) D17.5 mm