General description The RJ45 RJ11 RJ12 UTP LAN Network Cable Tester is an automatic tool designed for efficiently diagnosing network and telephone cable issues. It features an LED display that quickly identifies short circuits, open lines, cross lines, and other faults. The tester consists of a host and an auxiliary unit that can be separated, allowing for a maximum disconnection test distance of 100 meters. Technical specifications Maximum disconnection test distance: 100 meters Power source: Requires a 9-volt battery (not included) Usage Tests Cat 5, Cat 5e, Cat 6, Cat 7 Ethernet cables Compatible with RJ11 4P, RJ12 6P, and 8P RJ45 cables Can test one end of the network cable to check connectivity at the other end Recommended to replace the battery when the LED light dims Other information Note: Please install the battery before use For testing with a switch, ensure the power cord is unplugged