NF-8601 Series are newly developed by our company which are capableofanti current interference . The equipment is composed of three parts: main tester (NF-8601-M), receiver (NF-8601-S) andremote identifier (NF-8601-R). It is a multifunction device, capable of measuring cable length, cable tracing, cable continuity testing,PoE and PING functions, also it can detect voltage presence. Userscan read the test results visually from the 3.7 inch color screen. All these make this item be as a practical tool for low voltage system installation and maintenance technicians of communication circuits . and comprehensive wiring circuits. It is widely used in the fields like telephone system, computer networks and other metal lead circuits.