Review on Sperry Instruments ET64220 Wire Tracker Wire Tracer: A Must-Have for Audio / Video Installers, Coax, CAT 5, Speaker & Phone, with Adapter Plugs (RJ-45, RJ-11, Coax & More) - Yellow by Luis Harper

In the age of wireless technology, this tool may seem unnecessary; until you work in an old house or building. Reusing previously routed coax, UTP, speaker wire, etc. can save you time, money, and hassle if you can figure out what goes where. On the back of this tool are connectors for all types of infrastructure. The transmitter runs 45 minutes before a timeout to save batteries, and the sensor has an adjustable volume that's handy for noisy cross-connect sites. The only downside is that the coaxial connector is a male and you need a female to female adapter to connect it to the other male ends. Also, the probe has a tendency to slip out of the pocket on the back of the transmitter if you turn it upside down.