Features: 1.Quick Locate: The Phone line tester locates breakpoints easily and quickly without opening the cover of the wire, with enhanced cable types and a wide range of functions. 2.Continuity Function: Check cable continuity function, complete detection of network cable sequence, short circuit, circuit, error, reverse. 3.Trace Line: Cable tracer traces RJ11, RJ45, cable or other metal lines (through adapters), and is an essential test tool for communication engineers, wiring engineers, and network maintenance personnel. 4.Check Status: Check the status of the telephone line, test the working status of the telephone line (idling, ringing, offline), and judge the prompt and line. 5.Multifunctional: The Cable tester is a multifunctional handheld cable testing tool with reinforced cable types and multiple functions for a wide range of applications. specification:Item Type: Network Cable Tester RJ45 Material: ABS Operating Temperature: 0C to 40C, Maximum Relative Humidity 80% (Non Condensing) Storage temperature: minus10 to 50C, Maximum Relative Humidity 80% (Non Condensing, Battery Not Included) Height: < 2000 Meters Explosionproof Grade: IP 40 Transmission Signal Distance: About 300 Meters Battery s: Transmitter: 1 Section 6f22/9v (Not Included) Receiver: 1 Section 6f22/9v (Not Included) PackageList: 1 x Receiver 1 x Transmitter 1 x Network Cable 1 x Crocodilian Clip Cable Adapter 1 x User Manual