Precise Tracing with Anti Interferences: Quickly identifies wires among multiple cables without false alarms, ensuring accurate and stable Advanced Cable Testing: Measures cable length, detects shorts, breaks, and crossing wiring faults for fast and accurate troubleshooting of CAT5 / CAT6 cables Safe Detections: Safely checks live switches cables without damaging equipment, ideal for secure use in server rooms and data centers Rechargeable Long Battery Life: Built in rechargeable battery eliminates frequent battery changes, perfect for outdoor installations and extended work Multifunctional Design: Combines line tracing, pair testing, length measurement, and detections for comprehensive networking cabling solution, Manufacturer: ERRORY