The specifications for these devices state that they have 5 digit postcode search.

If anyone has actually used / owns one of these units, can they explain what happens if you search by postcode?

Say for example I want to search for AB12 3DE, the unit will let me enter AB12 3, do I then get a list of streets in that location or do I get a list of postcodes in that location?

The advantage of 8 digit postcode search is obvious, I assume with all digits it can narrow the option down to the centre of that location, e.g. my own postcode covers one half of one side of my street (nos. 42-90), so that's pretty accurate and it pretty much puts the destination 'on' my house.

Can anyone help?