NOYAFA China Anti-interference wire tracker NF-168S,with own technology patents,NF-168V/NF-168S is an updated item with multifunction of cable tracing,mapping and Visual fault locator (this function is only for NF- 168V)according to sales requirements. It follows the shells of NF-168 emitter and receiver.But compared to series products, it's highlights is three tracing modes, three mapping mods, and Visual fault locator. Tracing modes---Ordinary tracing,Anti-interference, PoE switch; Cable mapping--Fast mode, Slow mode,Manual mode; Visual fault locator-Continuous mode, Pulse mode.