Features: 1.2 in 1 Fiber Optic Tester: A 2 in 1 fiber optic tester with OPM and VFL functions, eliminating the need for separate equipment and making it more convenient and powerful. 2.High Accuracy: With an accuracy of 0.2dB, the optical power meter provides precise measurements, offers 7 selectable wavelengths, including 850/980/1300/1310/1490/1550/1625nm, and has a measurement range of (?50) to (+26) dBm. 3.2.5mm Universal Interface: The meter features a widely compatible 2.5mm interface, which comes with a silicone dust cover to keep it from damage, ensuring a longer lifespan. 4.Backlit LCD Screen: The meter is equipped with a backlit LCD screen, allowing clear visibility even in dark or low light environments, with an LED light for illumination, enhancing efficiency during operations. 5.Shockproof and Drop Resistant: The meter is designed with a silicone protective cover to reduce collision damage, offering enhanced durability and prolonging its lifespan. 6.Auto Shutdown: The meter automatically shuts down to conserve power, ensuring longer working and standby times, saving you time and hassle. specification:Item Type: Optical Power Meter Material: ABS Wavelength: 850 to 1625nm (850/980/1300/1310/1490/1550/1625nm) Measurement Range: (-50) to (+26) dBm Optical Connector: 2.5mm Universal Connector Power Supply: 2 x AAA Batteries (not included) Resolution: 0.01dB Accuracy: 0.2dB Operating Temperature: -10 to +60 () Storage Temperature: -25 to +70 () Size: Approx. 137 x 60 x 37mm / 5.4 x 2.4 x 1.5in Battery Operating Time: 20 Hours PackageList:1 x OpticalPowerMeter 1 x User Manual Download Guide NotePlease allow some error due to manual measurement.