Can someone recommend a good brand for me to get?

[Zincubus]

Oh.
Sounds pretty useful, then.

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That actually is pretty cool.
I'll look into finding one.

Those were two different makes from two different sellers and about 3 years apart yet you can see how accurate they are ...
Both cost under a tenner .

I was told that the expensive ones have identical ' inner workings ' which seems perfectly conceivable .