Review on Easily Locate AC Circuit Breakers & Test GFCI Outlets with Klein Tools ET310 by Minas Chase

I bought this unit to put an end to the countless trips between the fuse box and an electrical device (in this case an external headlight) that I wanted to turn off. I followed the instructions exactly; Turn on the Klein block, then reset the block so it can "learn" my backup field. Then carefully move slowly and hold the tip of the device at right angles to the breakers and move down. After 6 tries and several false positives that I had found the right switch, I had my wife flip the switches while I watched the spotlight. This module will not save you any time; it actually added time to work. The device may have been defective, but it's annoying when companies force customers to control quality. I could trade it in, but felt the results wouldn't improve with another device.