Triplett Fox and Hound Jr. 3375 Wire and Cable Tracer performs basic telephone line tests such as loop mA, line polarity, and ringing voltage as well as standard wire tracing capabilities. The Triplett 3375 features a very compact design for both the probe and generator, signal strength indicated by visual cues, an integrated earphone jack for noisy environments, overload warning beeper, and more. The Triplett 3375 is fantastic due to its small size; most other wire and cable tracers are much larger and bulkier making them not as ideal for convenient storage and transportation.