1. Signal Communication: Utilizes digital signal communication with strong anti-interference capability, ensuring noise-free wire tracing. With digital signal demodulation, it can trace wires up to 3 kilometers and accurately detect cables buried within 10 centimeters underground or in walls. 2. Outstanding Power Supply: Equipped with a built-in 3.7V lithium-ion rechargeable battery, providing a stable and long-lasting power source. 3. Dedicated Lighting Lamp: Includes a built-in lighting lamp for smooth operation in dimly lit environments. 4. Versatile Interface Support: Supports cable testing for both RJ11 and RJ45 interfaces, offering wide applicability. 5. Superior Wire Tracing and Testing: The wire tracing function accurately locates the target wire, while the testing function detects issues such as open circuits, short circuits, and incorrect wire sequences, ensuring reliable network and cable operation. Important Safety Features: Supports live wire tracing for weak current and features a POE anti-burnout function. Power Supply:1 x AA battery (Not included batteries) Color:Green Material:ABS Package Contents: 1 * Network tester Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.