Review on Gardner Bender CAM-10 Circuit Alert® Voltage Sensing Module by Brian Martin

One of the commenters said don't trust your life with this product and downgraded the star rating. I agree that you don't trust him with your life. But it's a BIG thing. This way I can find hidden wires before hammering in nails and screws and check outlets without having to run to the junction box. I order one for each member of my team. By sharing one of these, we saved ourselves a lot of trips to the toolbox - this article is now a permanent fixture in my toolbelt.