BSIDE FWT11 RJ11 / RJ45 Telephone Wire Tracker Ethernet LAN Network Cable er Detector Line Finder The product is shipped based on the color or size of the main image of the product page. 1. instrument is a multi-functional handheld cable testing tool. wide application with reinforced cable types and multiple functions. 2. It is a necessary testing tool for telecommunication engineering, wiring engineering and network maintenance person. 3. Work when RJ11/RJ45 cable is on power 4. Wire Tracing: Trace RJ11, RJ45, cables or metal wire (via adapter). 5. Easy and fast to locate the break point without opening the wire's cover. 6. Network cable collation: Judge short-circuit, breaking circuit, open circuit and crossing. 7. line level, positive and negative polarity. 8. Status of telephone line checking: the working status of telephone line (idle, ringing, and off-hook) and judge TIP and RING line. 9. wire continuity.