Tone & probe kit. For tracing and identifying low voltage wiring (telephone)
Two 9 volt batteries required - not included
Manufacturer part# 701K-G
Brand name (s) : Tempo Communications

Kit includes :
77HP-G High Power Tone Generator
200EP Tone Probe Amplifier
A rugged, woven nylon carrying case (700C)

Features:
Two distinct tracing tones
Audible short circuit indication for testing continuity of wiring / cables
Used to trace wire paths and identify cables in common wiring systems
Check for open and shorted wiring pairs and confirm the presence of telephone service
Simple operation with audible and visual tone signal indication
NOT FOR USE ON LIVE ELECTRICAL CIRCUITS