1.functions:It can test coorespondingly double-twisted cables 1,2,3,4,5,6,7,8 and G,meanwile,can judge wrong connection,short .. JACK:RJ45/BNCCABLE TYPE:UTP/STP/FTP/COAXIALTEST SPEED:1DIPLAY:LED SINGLE-END IS DOUBLE-COLOREDBATTERY:6F22 9V Ic:20Ma multifunctional network cable tester