Fangrui Product Details 1. Benetech Gt66 Rj11 Rj45 Multifunctional Cable Tester Line Finder Net Cable Detector 2. Features 3. The Long-distance Line-tracking Function Can Be Easily Tested In The Face Of Messy And Long Network Cables. 4. With The Detection Functions Of Network Cable Line Sequence, Line Voltage, Line Short Circuit, Etc. 5. Volume Adjustment Function, In A Noisy Environment, If The Sound Of The Speaker Is Not Evident, The Volume Can Be Adjusted Up. 6. Lighting Function, The Receiver Is Equipped With Brightness Led Light, And Lowalight Environment Auxiliary Lighting Work. 7. It Is A Necessary Testing Tool For Telecommunication Engineering, Wiring Engineering And Network Maintenance Person. 8. Functions 9. The Product Is A Professional Networking Cable Inspection Device That Contains Wiring Tracing, Cable Order Verifying And Wiring Faults Inspection Functions. The Product Contains Following Functions: 10. Long Distance Wiring Tracing. 11. Internet Cable Order Verifying. 12. Wiring Voltage Check. 13. Wiring Voltage Polarity Check. 14. Wiring Shorts Inspection. 15. Low Battery Indication. 16. Adjustment For Tracing Sensitivityvolume. 17. Earphone Jack Output. 18. Flashlight. 19. Specification 20. Material: Abs 21. Line-tracking Signal Transmission Distance: Greater Than 1km 22. Display : Led 23. Power Supply: Transmitter: 3 X 1.5v Aaa Dry Battery (not Included), Receiver: 1 X 6f22 9v Dry Battery (not Included) 24. Environmental Working Temperature: -10 ~40 Degree C (14 ~ 104 Degree F) 25. Relative Humidity: 10- Rh 26. Storage Temperature: -10 ~40 Degree C (14 ~ 104 Degree F) 27. Dimension: Transmitter 63 X 134 X 31mmreceiver40 X 200 X 32mm