electrical test/ volt meters ?

[simonm]

also need to be idoit proof ! and have basic instructions !

I don't think there is such a thing as an idiot proof multimeter.  Unless you're electrically competent they're only good for telling if you have a circuit and/or voltage going through a circuit.

I mainly use mine on the "squeel if there is a circuit setting" and sometimes on the 12/24/240v test.

If you know nowt about multimeters just buy a cheap one, then go back at a later date if/when you need to IMO.