Feature:1. Better Testing: The optic fiber power meter has a wide testing range of -70-and10dbm, which also ensures high accuracy.2. Reliable Using: Comes with calibration and relative power calculation function, the digital optic cable is easy to use.3. The Wavelength: 10 kinds of wavelength, 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650 nm.4. Simple Working: Thanks to the sensitive chip and sturdy internal structure, the optic tester is quick in response.5. Easy Carrying: Designed to have a compact size and a light weight as well, very easy to carry for indoor and outdoor.Specification:Item Type: Optical Fiber Power MeterModel: AUA-M70Material: ABSPower Supply: 2 x AAA battery, delivered without battery. Power Measurement Range: -70-and10dbmProbe Range: InGaAsWavelength Range: 850-1650nmStandard Wavelength (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650Display Resolution: Linear Display: 0.1 percent Logarithmic Display: 0.01dBm. Working Temperature: -10-and60Storage Temperature: -25-and70Automatic Shutdown Time: 10 MinutesBattery Continuous Working Time: No less than 40 hours. .Package List:1 x Optical Fiber Power Meter 1 x Lanyard1 x User Manual