Description: FWT81 network cable tester line finder network tester is used for line finding of network line/line/cable. can search the line when the power switch is on. It has the function of line - to - line and break test. The transmitting distance is 300 meters. suitable for telecommunication engineers to arrange the network maintenance personnel. Specification: Material: Rubber + Electronic Components Product Size:Bare machine size: Receiver: 17 x 4.5 x 3.5cm/ 6.69 x 1.77 x 1.37inch,Transmitter: 12 x 4.8 x 3.4cm/4.72 x 1.89 x 1.39inch, two lines are about :20cm/7.84inch. Working temperature: 0-400 °C storage temperature: -10-50 °C elevation: