Multifunctional Design: Combines line tracing, pair testing, length measurement, and detections for comprehensive networking cabling . Precise Tracing with Anti Interferences: Quickly identifies wires among multiple cables without false alarms, ensuring accurate and stable . 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. Package includes: 1Set Wire Locator