Features Measuring Range: Optical Power Meter with Led Light, with A Measurement Range of -70-10dbm, Accurate Measurement And Low Error. 10 Wavelengths: Supports up to 10 Wavelengths, 850nm 980nm 1270nm 1300nm 1310nm 1490nm 1550nm 1577nm 1625nm 1650nm. 2.5mm Interface: The Optical Power Meter Has Standard 2.5mm Interface, Universal for Sc Fc St Adapter, Convenient And Practical. Auto Shutdown: in Standby Mode, The Fiber Optic Attenuation Tester Automatically Shuts Down After 10 Minutes, Effectively Saving Energy. Portable Design: The Fiber Attenuation Tester Has Compact Size, Comfortable Holding, with Large Display Screen, Which Is Clear And Intuitive. Specification: Item Type: Optical Power Meter Model: AUA Y710A Power Measurement Range: -70-10dBm Probe Type: For InGaAs Wavelength Range: 850-1650nm Standard Wavelength: 850nm 980nm 1270nm 1300nm 1310nm 1490nm 1550nm 1577nm 1625nm 1650nm Linear Display: 0.1% Logarithmic Display: 0.01dBm Working Temperature: -10-60℃ Storage Temperature: -25-70℃ Battery Continuous Working Time: Not less than 40 hours Automatic Shutdown Time: 10 minutes Power Supply: 2 x AA battery (not included) Package List: 1 x Optical Power Meter 1 x Adapter 1 x User Manual Package List 1 x Optical Power Meter 1 x Adapter 1 x User Manual