The new instrument is provided with fluent appearance, excellent hand feel and considerate human-centered design. It owns three great functions of hunting, wire sorting and circuit status testing and the features of quickness and accuracy, thus, it becomes an available tool for technicians in installation and maintenance of a weak current system, such as communication line, comprehensive wiring circuit, etc. It is widely applicable to a telephone system, computer network, other metal wire circuit, and other fields. Features: One person enough to complete cable continuity check Check wiring error in 5E, 6E, telephone line, coaxial cable, USB cable and such as open circuit, short circuit, jumper wire, reverse connection or cross-talk interference Locate the wiring or connection error Measure cable length and determine the distance of open circuit and short circuit Dynamically calibrate cable length Portable unit Automatically time-delay shut off Backlight display function Measure length and pair with or without far-end recognizer Far-end recognizer with prompting voice Self-checking function Single board computer software watchdog design Specifications: Display: 4 x 16 character big screen LCD Type of cable tested: STP/UTP twin twisted cable Coaxial cable telephone line Type of cable detected 5E 6E telephone wire coaxial cable USB cable and other metal wires Ambient temperature : -10°C ~ +60°C Tester Port Tester RJ45 mater port (M), tester LOOPBACK RJ45 port (L), hunting RJ45 port (with RJ45); The RJ11-to-alligator converters are used to measure and check the continuity of coaxial cable and telephone line. Length measurement of Twin Twisted Cable: Scope : 1~350M (3~200ft) Calibration accuracy : 3% (+/-0.5M or +/-1.5ft)(calibrating cable >5M) Shipment accuracy : 5% (+/-0.5M or +/-1.5ft).(AMP, AT&T Class 5 cable) Display: M or ft Length Calibration: user can set calibration factor by himself with a given length cable. The length of calibrating cable more than 5M Wire Sequence and Locating Cable Error: >>Checks errors such as open circuit, short circuit, reverse connection, cross-over or cross-talk interference. Locating Cable: 8 remote identifier test jacks (ID1 > ID8) (8 far-end test jacks are included in set) Automatic time-delay shut Off time: the tester does not operate for 30 minutes. Overall Dimension Main tester : 185 x 105 x 50mm Receiver : 218 x 46 x 29mm Remote identifier : 84 x 34 x 27mm Power : Two (2) 9V batteries (included) Set includes: 1 x Main unit tester 1 x Receiver 8 x far-end passive test jacks (ID no.ID1-ID8) 1 x Earphone 1 x RJ45 Cable 1 x RJ11 Cable 2 x 9V Batteries 1 x RJ11-to-Alligator converter 1 x English Instruction manual