Features 1.MEASURING RANGE: Optical fiber power meter can measure 8 standard wavelengths of 800, 850, 980, 1300, 1490, 1550, 1625, 1700. Power testing ranges from 70dBm to +6dBm 2.ACCURATE AND CONVENIENT: Fast and accurate, no need to wait for preheating, plug and play. Optical power meter has the function of relative power calculation and calibration function 3.WITH MEMORY AND BACKLIGHT: Fiber optic cable tester support lighting, automatic shutdown, backlight selection, wavelength memory, and user calibration 4.PORTABLE AND UNIVERSAL: The optical fiber power meter has a compact and portable design, support FC, SC, ST universal interface, and has a low battery indicator 5.SUPPORT FUNCTIONS: Optical power meter support SM and MM modes, dB, dBm, nW units, automatic power off, and support frequency detection Specification Item Type: Optical Fiber Power Meter Material: ABS Wavelength Range: 800-1700nm Standard Wavelengths: 850, 980, 1300, 1490, 1550, 1625 Connector: FC, SC, ST Power Measurement Range: -70~+6dBm Auto Power Off Time: 10 Minutes Battery: 2 x AAA rechargeable lithium battery(not included) Package List 1 x Power Meter 1 x Hanging Rope 1 x User Manual