I love my Fluke Tone Generator. While targeted at the 'pro' segment, I use this all around my house while tracing the already installed cable and pulling new lines while setting up my home network. The signal is strong enough to locate from a short distance, helping at times find the lines either behind drywall, and under a few inches of blown insulation in the attic. However, there were a few instances where there were two lines in a single box, and I noticed some bleed-over in the signal, and I had to listen with a fairly discerning ear to differentiate between the two lines.