Cable tester is especially designed for quick on-site resting of connection and network cables. Tester provides one RJ12, RJ45, Firewire IEEE 1394 and USB port. you can also test coaxial network cables using the BNC connector. Tests for short circuits, assignment, open ends, crossover, shielding Fully automatic 1-click-test within seconds 9 LEDs for clear representation Dimensions: 200x100x25mm Contents: tester with remote, 1 battery (type 9V block), RJ-45/11 and BNC testing cables, BNC terminal resistor, bag, operation instructions