ST203 Wire Tracker is used to identify and trace wires or cables within a group without damaging the insulation. For telephone line, it can identify some state in the line, and more convenience to ins

ST220 Telephone Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a common Tel Line Tester, it also has the functions of high volt

ST220B is a compact telephone line tester combining basic line tester function, auto ring, calling subscriber, checking line pair and high voltage protection. It is rather a good portable, handheld te

This Telephone Line Testeris a portable and intelligent line fault tester which is designed following human engineering theory with the appearance style like barbell, adopting advanced technologies su

ST230B Telephone Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a Telephone, it also has functions of high voltage protection,

ST230C Telephone Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the basic functions as a common Tel Line Tester, it has functions of high voltag

ST230D Telephone Line Tester is a new kind of line fault tester with safety &multi-functions capabilities. Besides the basic functions as a common Tel Line Tester, it also has functions of high vo

Brief Introduction ST230E Line Tester, as a multi-functional tester, due to the dumbbell shape, it can be put on the shoulder during operation, which can enable the operator to deal with other work co

ST230F Telephone Line Tester is one portable and intelligent line fault tester, which adopts advanced technologies such as intelligent CPU, IC & surface mounted technology (SMT) technology. It int