Unlike earlier versions of the PTS 93, the PTS 93-09 features a surge protection indicator and a safety fuse for voltages exceeding 120 volts. The advantages of the PTS 93-09 at a glance: - Indication of an applied voltage over 85V. - Integrated surge protection for voltages over 120V. - Additional speaker in the transmitter, usable as a simple continuity tester (beeper). The PTS 93-09 is designed for the quick and safe testing, checking, and identifying of cables and lines in both analog and digital telecommunications networks. The PTS 93-09 also offers benefits when used in data and signal networks. It is also possible to use the device in de-energized 230/380 V networks. Features of the PTS 93-09: - Polarity testing - Non-contact identification of lines - Testing of the subscriber line - Insulation test / acoustic continuity tester - Voltage indication over 85V and surge protection for over 120V. High-strength ABS housing, delivered including a transport case, powered by 9 V block batteries (not included). For optimal use of the PTS 93i as an accessory, it is recommended to have two needle contact probes NK, which allow direct connection of the testing device to insulated lines without removing the insulation.