Feature: 1. WORKING RANGE: Mini optical power meter, power measurement range is ‑70‑10dbm, wavelength range is 850‑1650nm, efficient and durable. 2. MULTIPLE FUNCTION: With fast and accurate measurement, no need to wait for warm up, which has relative power calculation and calibration function. 3. GOOD PERFORMANCE: Sensitive chip and sturdy internal structure, low power consumption, auto shutdown in 10 minutes, can work continuously for 40 hours. 4. COMPACT SIZE: The optical fiber power meter has a compact size and covers most of the maintenance needs of communications engineering. 5. ABS SHELL: Handheld fiber power tester, the shell is made of ABS material, light weight, wear and aging resistant, and has a long service life. Specification: Item Type: Optical Power Meter Model: AUA M7 Material: ABS Power Supply: 2 x AAA battery (battery not included) Power Measurement Range: -70~+10dbm Probe Type: For 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: Not less than 40 hours. Package List: 1 x Optical Power Meter 1 x Lanyard 1 x User Manual