4 IN 1 NETWORK CABLE TESTER RJ45(UTP/STP) USB, RJ11/RJ12/BNC/RCA LAN CABLE CAT5 CAT6 WIRE TESTER Can test RJ11/RJ45/USB/BNC cables. Terminator 25 Ohm / 50 Ohm indications. Straight or crossover indication. Detachable module for testing two remote points. Powered by 9V alkaline battery. Palm size with carrying bag. Automatic deactivation.