Cable tester. For RJ11, RJ12, and RJ45 connectors (UTP/STP). Tests cable connectivity and integrity over distances up to 100 meters, including shielding. Tests 2/4/6/8-pin patch cords. Detects short circuits. Powered by a 9V battery (not included). Operating temperature: -10°C to 40°C. Dimensions: 112 x 99 x 20 mm. Weight: 0.111 kg. 2-year warranty.