1. Live line search and measuring line length: It can quickly and directly search for target CAT5, CAT6, Ethernet cables, telephone cables, coaxial cables, USB cables, and other metal cables among numerous wires. It measures the length of network cables during open circuit processes with a range of 5 350 m and an accuracy of up to 98%. 2. Detect cable condition: It can test open circuits, short circuits, miswiring, reversed connections, and pairing status for RJ45, RJ11, and BNC cables, as well as locate cable breaks. The LCD screen visually displays test results for quick and accurate operation. 3. Hub Flashes: When switches and routers are powered on, the device can quickly locate the target line based on the flashing frequency of the port LED lights. 4. Polarity and voltage test: It can determine the polarity and voltage value of DC power within 0.5V 60V and includes a low voltage alert function. 5. Multifunctional: It supports data storage and retrieval, voice prompts, adjustable auto shutdown timing, and a built in light for nighttime operations.