Item Type: Optical Fiber Power Meter Model: AUA-M70 Material: ABS Power Supply: 2 x AAA battery, delivered without battery. Power Measurement Range: -70~+10dbm Probe Range: InGaAs Wavelength Range: 850-1650nm Standard Wavelength (nm): 850, 980, 1270, 1300, 1310, 1490, 1550, 1577, 1625, 1650 Display Resolution: Linear Display: 0.1%; Logarithmic Display: 0.01dBm. Working Temperature: -10~+60 Storage Temperature: -25~+70 Automatic Shutdown Time: 10 Minutes Battery Continuous Working Time: No less than 40 hours. 1Better Testing: The optic fiber power meter has a wide testing range of -70~+10dbm, which also ensures high accuracy. 2Reliable Using: Comes with calibration and relative power calculation function, the digital optic cable is easy to use. 3The Wavelength: 10 kinds of wavelength, 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650 nm. 4Simple Working: Thanks to the sensitive chip and sturdy internal structure, the optic tester is quick in response. 5Easy Carrying: Designed to have a compact size and a light weight as well, very easy to carry for indoor and outdoor. 1 x Optical Fiber Power Meter 1 x Lanyard 1 x User Manual