My wire tracing kit consists of a tone generator I don't know the brand of because the lettering is worn off. It's black, the size of two decks of cards stacked

My wire tracing kit consists of a tone generator I don't know the brand of because the lettering is worn off. It's black, the size of two decks of cards stacked, a slide switch for off/tone (two types of waveform)/continuity, clip leads or RJ-11, held together with electrical tape, and the battery lasts forever in it. I've sometimes forgotten to turn it off for days and still get about 5-7 years between changes. On the other end, although I also have a newer inductive probe, I keep around a Radio Shack mini amplifier (#277-1008) with clip leads plugged in for input. It can be used as a tracer or monitor, has a headphone jack for noisy places, and packs a lot of gain in a small package.