Power supply: 4 x 1.5 V DC AA batteries (not included) Power consumption: up to 16 mA Display: 4 x 16 character LCD screen, 61.6 x 25.2 mm Designed for: STP/UTP twin twisted, coaxial & telephone cable Working ambient temperature: -10 ... + 60°C Tester port: tester RJ45 master port (M), tester LOOPBACK RJ45 port (L), far-end recognizer RJ45 port (R) Max cable length: up to 1350 m Calibration accuracy: 3% (+/- 0.5 m) Calibration cable length: > 5 m Cable problems detected: open circuit, short circuit, reverse connection, crossover or cross-talk interference Automatic shut-down: after 30 minutes Dimensions: 180 x 80 x 40 mm Net weight: 0.25 kg