Was wandering around SuperCheap (Taringa QLD) earlier tonight and found this… so of course I bought one :)
This is a small battery powered device (small 12V A23 Battery included) you plug into one of your car or trucks blade fuse sockets to measure how much current that particular circuit is drawing. It's capable of measuring up to 20A DC at voltages up to 48V DC so could come in handy for any other Oz Bargain tinkerers like me to use on their cars or buy a few more and rip them apart to use on other things :)
These have been around for a while but they usually sell for around 3-4 times this amount at places like Jaycar (http://www.jaycar.com.au/productView.asp?ID=QP2251) or on eBay (http://www.ebay.com.au/itm/CF-02S-AUTOMOTIVE-CURRENT-TESTER-…) however these were just sitting on a peg in the electrical isle with a standard white price tag.
I always wanted a few to use as a cheap current meters on other projects but never wanted to blow $13+ on something that I'd just rip apart but for $5 it's a bargain in my book and thought there may be other nerds out there who think the same way ;) The A23 battery is worth about half that in itself! I just hope other SuperCheap stores aroun the country also have them in stock and at this price.
a multimeter would do the same trick. many measure up to 20a dc