Features: 1.Quick Positioning: This PoE tester can detect multiple cables at the same time, quickly find out the target cable, effectively improving work efficiency. 2.Polarity Testing: This network cable tester can quickly test the positive and negative polarity of the cable to avoid the loss caused by the wrong connection. 3.Continuity Testing: This Ethernet cable tester supports continuity testing that can quickly determine whether the cable is connected, convenient and time saving. 4.Digital Signal Tracing: This RJ45 network tester can quickly locate digital signal sources. And it features high sensitivity and less noise interference. 5.Wide Application: This telephone line tester is widely applicable to engineering wiring, network and equipment maintenance, convenient for accurately locating the line and port. specification:Item Type: PoE Tester Material: ABS Functions: Multi Cable Testing, Polarity Testing, Battery Positive and Negative Detection, Continuity Testing, Digital Signal Tracing Transmitter Battery Type: 2 x AAA Battery (Battery Not Included) Receiver Battery Type: 2 x AAA Battery (Battery Not Included) PackageList:1 x PoETester 1 x Receiver 1 x Network Cable 1 x Adapter Cable 1 x Storage Bag 1 x User Manual