Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Mine is a life saver.

I am in the process of wiring a boat and the mass of wires can get very confusing. The wire tracker is in constant use and works well out to about 200' but you do have to remember that any wire electrically connected to the transmitter will be carrying a signal. For example, in tracing home wiring if you connect to the neutral (white wire) you will find a signal on all the white wires because they are all connected to the same bus at the panel. Similarly if you trace the hot (black wire) you have to turn off the breakers to isolate the wire you are tracing. But you should do that anyway to avoid a lot of smoke and possibly a rather painful supprise.Overall, the Wire Tracker is well worth the money as long as you follow the instructions and have a little understanding of how it works.