Self-calibration for reliable measurements, minimizing setup and maintenance effort. Operates on 2 AA alkaline batteries (not included) for portable use. Long operate time Continuous operation for more than 40 hours on a single battery setup. Clear, versatile display Shows linear mW and logarithmic dBm readings on the same screen for easy interpretation across ranges. Auto switch and fast interface switching Automatically handles switching and supports fast changes between FC, SC, and ST interfaces for quick compatibility. Key benefits - No external calibration required, saving time in the field or lab - Portable power with long runtime for extended measurements - Dual-scale reading on one screen simplifies verification and budgeting - Broad connector compatibility reduces setup time and tool changes Use scenarios - Field fiber installation and maintenance: quickly verify power levels with both mW and dBm values to confirm link budgets. - Lab calibration and testing: switch between FC, SC, and ST connectors without hardware changes. - On-site troubleshooting and commissioning: monitor optical power during alignment and ensure proper coupling and performance.