Test 4 types of cables: RJ-45, RJ-11, USB and BNC. Test installed wiring or cables. Tests shielded (STP) or unshielded (UTP) LAN cables. Test shields in USB cables. Can test from 2 remote points. provides audible annunciation of test results. Remote unit stores in Main unit. BNC terminator 25/50 Ohm indications. Straight or crossover indications. indicate connections and faults of wire and pins. RJ-11/RJ-45 are equipped with 50u gold plating. 300 feet test distance (RJ-45/RJ-11/BNC). Ergonomic portable handheld design. Convenient battery access. Low Battery Indicator. Simple one button test. Fast speed testing. Cable Tested: UTP and STP LAN cables, terminated in RJ-45 male connectors (EIA/ 568); RJ-11 cables with male connectors, 2 to 6 conductors installed; USB cables with Type A flat plug on one end and type Plug on other end; BNC cables with male connectors Faults Indicated: No Connections, short circuit , Opens and Crossover Low Battery Indicator: LED lights to indicate low battery Power: 1 x 9 V 6F22 DC Alkaline Battery (Battery Not Included) Type:Cable Tester Model Number:BNC4N1 color:Grey-white :ABS Package Contents: 1 x 4-in-1 Network Cable Tester(without 9V alkaline battery) 1 x BNC adapter 1 x storage case Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.