Hi there,

It's just a bog standard electrical test meter.. will detect and report voltage and current output .... you should pay about 2 to 3 quid for a test meter from the likes of ebay...

The DANGER when doing current checks is that this can only be measured with the meter in series with the supply... and if you have hold of it then this means you are also part of the supply circuit. Fine if you know what you are doing and there are no problems.

However, if there were to be a fault on the supply that you were unaware of you could be at risk when measuring current. 40 volts or so DC at current of 10 - ish Amps has the potential to do you harm. There's a special kind of test meter called a clamp meter to test current without being in circuit yourself.. it just clamps around the wire and the electronics perform the necessary wizardry to safely read both voltage and current. They are quite expensive tho... clamp meter is probably in the region of £40 to £50 minimum.

It's the kind of thing a sparks would use on site...