"I bought this to identify a supply cable in a tight bunch of cables all with sheathing (lighting circuits, domestic job). It works fine through sheathing and it would flash/bip only when you on the side of the cable with the brown (line) wire. Since than I used it many times in similar situations, never failed me. One of the tools that I have often with me. Bit expensive but overall happy with the purchase"
"got this product on offer, so can't grumble at the price. 1st day I bought it used it six different times. You can easily keep it in your pocket all day so for a heating engineer like me there's no need to keep going to the van for the multi meter. This item is a time saver and would highly recommend."
"This probably saved my colleagues life today. I always have it in my pocket, and so when working on a 400v supply and nobody was sure if the feed to the isolator we were due to be working off was live or not, I produced this from my pocket and determined it was still live. "I think it's off" could have been a costly assumption, certainly more than the £22 price of having this to hand."
"Had a number of pen testers by other makes before, they never last very long and don't always give reliable results. The Fluke tester is a bit expensive, but does the job really well. Pay the extra and get a great tool."