... and can test common line via alligator clip. SHOMLIN LCD network cable tester SML-8838 Features and functions working current: emitter≤ ... , jumper, reverse, crossover, matching connections and cable break point for 5E/6E cable, BNC cable,USB and phone line and visually displays ... up to 1,200 meters for network cable, coaxial cable, telephone line, USB cable. The accuracy of the measurement of length ...