This cable tester is a upgrades automatic cable tester‎,‎ it not only test network and phones‎,‎ but also test printer‎'‎s USB cable‎,‎ super useful tester for the person who work in technical center or high‎-tech company‎,‎ also work for daily life and office bug‎.‎ It can test correspondingly double‎-twisted cables 1‎,‎2‎,‎3‎,‎4‎,‎5‎,‎6‎,‎7‎,‎8 and G‎,‎ meanwhile‎,‎ can judge wrong connection‎,‎ short circuit and open circuit‎.‎ 468AT/M726AT intelligent tester‎,‎ using low power design‎,‎ having four speed test mode‎,‎ can non‎-stop run over 30 hours‎(‎super save power‎)‎ long standby time‎,‎ more than 28 months‎.‎ Installation guide‎:‎ Open the battery cover‎,‎ put in a 9V laminated battery ‎(‎no include‎)‎ according to the positive and negative correctly‎,‎ then the tester will make the sound ‎"‎didi‎"‎ twice means it begins auto scanning‎,‎ after scanning twice‎,‎ then the tester will make the sound ‎"‎didi‎"‎ 3 times ‎,‎ it turns to sleep mode‎.‎