Feature: 1. Fast and Accurate: With wide measurement range, which is ‑70 to +10dbm, the measurement is fast and accurate, no need to wait for warm up. 2. Excellent Performance: Using sensitive chip and sturdy internal structure, with relative power calculation and calibration function. 3. Long Battery Life: The battery consumption is low, ensuring a long battery life, which can work continuously for 40 hours. 4. 7 Wavelength: Has 7 wavelength, which are 850nm, 980nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm, can meet your most needs. 5. Convenient Operation: Plug and play, with display screen, LED light and SC FC ST adapter, which is more convenient for operation. Specification: Item Type: Fiber Optical Power Meter Material: ABS Output Optical Power: >1MW Output Distance: 5km Power Supply: 2 x AA battery (delivery without battery) Power Measurement Range: -70 to +10dbm Probe Range: InGaAs Wavelength Range: 850-1625nm Standard Wavelength(nm): 850, 980, 1300, 1310, 1490, 1550, 1625 Display Resolution: Linear display 0.1%, logarithmic display 0.01dBm Working Temperature (℃): -10℃ to +60℃ Storage Temperature (℃): -25℃ to +70℃ Automatic Shutdown Time (min): 10 minutes Battery Continuous Working Time: Not less than 40 hours. Package List: 1 x Fiber Optical Power Meter1 x Adapter1 x Manual