â·ÃÊͺ¶ÒÁÃÒ¤Ò Identify wire pairs, check continuity & test telephone line polarity TG20: Wire Tracer Kit TG20: Wire Tracer Kit Identify wire pairs, check continuity & test telephone line polarity Features: Transmitter with output cables terminated in modular RJ11 phone connector Transmitter injects traceable signal into cables, checks telephone lines, and performs continuity checks Non-Contact probe audibly identifi es selected wire or cable Easily trace wires from source to termination Test for properly operating phone lines Adjustable sensitivity control improves wire identification and eliminates false detection Continuity test — visible indication Complete with Wire Tracer Probe and Transmitter with RJ11 phone connector and pair of alligator clips, and two 9V batteries Cable Tester Extech TG20 à¤Ã×èͧ·´ÊͺÊÒÂÊÑ­­Ò³ à¤Ã×èͧ·´ÊͺÊÒÂáŹ