I would say that the Extech is not the best bet anymore. You would be better off with a Uni-T UT139C, an Amprobe AM-510, or maybe a UT61E. Those are in the order of my preference. Do a bit of more searching here and you will find many other opinions and options. IF you plan to keep the probes out the wall socket, then a UT136B at $20 or so is an OK buy too. It just won't last too long.