Feature: 1. Large Memory: This optical power meter can store 500 sets of data inside, and supports viewing at any time, which is convenient for you to use. 2. Self Calibration: Users can calibrate the optical power meter by themselves to ensure the accuracy and quick response of the optical power meter. 3. Low Battery Consumption: The battery of this optical power meter can work continuously for at least 40 hours, and the battery life is strong. 4. 7 Test Wavelengths: The tester has 7 wavelengths, 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, which can cover most of the needs of communication engineering maintenance. 5. Simple Operation: This optical power meter is easy to operate, no need for you to preheat, plug and play, and can perform relative power calculation. Specification: Item Type: Fiber Optical Power Meter Material: ABS Model: AUA G710B Output Optical Power: >20MW Output Distance: 20KM Power Supply: 2 x AA battery (excluded) Power Measurement Range: -70-10dbm Probe Range: InGaAs Wavelength Range: 800-1625nm Standard Wavelength (nm): 850, 980, 1300, 1310, 1490, 1550, 1625 Display Resolution: Linear Display: 0.1% Logarithmic display: 0.01dBm Working Temperature (℃): -10 - 60℃ Storage Temperature (℃): -25 - 70℃ Automatic Shutdown Time (Minute): 10 minutes Continuous Working Time of The Battery: Not less than 40 hours. Package List: 1 x Fiber Optical Power Meter1 x FC Conversion Connector1 x Instruction