Feature: 1. Detection Range: The fiber optic signal detection range is +13 to ‑50dBm, the power test range is +26 to ‑50dBm, can test wavelengths of 850nm, 1300nm, 1310nm, 1490nm, 1550nm, and 1625nm. 2. Direction Recognition: Using micro bending testing technology, accurately identify the direction of the fiber, when the fiber has a signal, the left and right direction lights display the signal direction. 3. LED Light Source: With red light source, LED light is stable and strong, with concentrated beam, effectively cooperating with circuit detection, no need to interrupt the light source during online testing. 4. 2.5mm Interface: The fiber optic tester has 2.5mm universal testing interface, compatible with more fiber optic adapters, and the color LCD display screen to ensure clear and intuitive viewing. 5. Multiple Functions: This tool has functions such as fiber optic recognition, optical power detection, visual fault location, and fiber optic cable detection, with a light shield to provide accurate test results. Specification: Item Type: Fiber Optic Tester Model: OFI Wavelength Range: 800-1700nm Probe Type: For InGaAs Adapter Types: 250um, 900um, 2mm, 3mm Modulation Frequency: CW, 270Hz, 1KHz, 2KHz Fiber Optic Signal Display Detection Range: +13 to -50dBm Signal Direction Detection Range: +13 to -35dBm (typical value) Signal Frequency Indication: 270Hz, 1KHz, 2KHz Signal Frequency Detection Range: +1330dBm (typical value) Standard OPM Module Testing Wavelength: 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm Power Test Range: +26 to -50dBm Unit: DBm, dB, xW Resolution: 0.01dB Uncertainty: ≤0.5dB Wavelength: 650±10nm Output Power: ≥10mW Test Interface: 2.5mm Universal Interface Display Screen: Color LCD Battery: 2 x AA Battery (battery not included) Working Temperature: -20-60℃ Storage Temperature: -30-70℃. Package List: 1 x Optical Fiber Tester1 x Storage Bag1 x User Manual