Features Good Compatibility: This optical power meter is compatible with EPON, GPON, XGPON, XGSPON, 10GEPON and other network types, supporting downlink mixed optical signal measurement and uplink burst optical signal measurement. Multifunctional: This optical power meter is multifunctional, which supports data storage, auto power off, backlight selection, auto calibration, user calibration and threshold setting. Multiple Wavelengths: This optical power meter comes with FC, SC, and APC interface adapters, and can simultaneously test three different wavelengths of 1310nm, 1490nm, and 1550nm. Excellent ABS Material: This optical power meter is made of excellent ABS material for the shell, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. Compact And Portable: This optical power meter is small in size and light in weight, which makes it very convenient to carry around and use. Specification: Item Type: Fiber Optic Cable Tester Model: SKL 300A Material: ABS Display: LCD Detector Type: InGaAs Power Supply Mode: 2 x AA Alkaline Dry Batteries ( Shipped Without Battery ) Simultaneous Testing Of Three Wavelengths: 1310nm, 1490nm, 1550nm Optical Power Meter Interface: SC, FC Interface, Provide SC APC, FC APC Adapter Package List:1 x Fiber Optic Cable Tester 2 x Adapter Package List 1 x Fiber Optic Cable Tester 2 x Adapter