Versatile Network Cable Tester with LCD Display LCD display allows easy monitoring and troubleshooting of network cables, including CAT5 and CAT6. Comprehensive cable testing capabilities: Visual Fault Locator and Cable Tracker help test continuity and identify short circuits, open circuits, and crossover issues in network cables. Integrated PoE testing: enables verification of power delivery modes from PoE switches to ensure correct operation of powered devices. Optical Power Meter functionality: measures optical power and light attenuation across multiple wavelengths (850/1300/1310/1490/1550/1625 nm). Practical applications cabling deployments: verify copper cable runs for continuity, identify miswires or faults quickly, and confirm proper cable performance before finalizing installations. Troubleshooting and maintenance: diagnose PoE issues by testing power delivery along network paths and confirming PoE compatibility with connected devices. Fiber link validation: after fiber installation, use the Optical Power Meter to assess optical power and attenuation across specified wavelengths to ensure link integrity.