1、3 IN 1 PURPOSE: The meter has optical power meter, red light tester and LED light function, meeting most needs of comm engineering maintenance. 2、EASY OPERATION: The optical power meter has sensitive chip and a sturdy internal structure, and supports plug and play, which is stable and reliable. 3、MULTIPLE FUNCTION: With relative power calculation and calibration functions, ensuring fast and accurate measurement, effectively improving efficiency. 4、10 WAVELENGTHS: Supports 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650nm wavelengths, SC FC ST adapter. 5、POWER SUPPLY: Built in 650mAh lithium battery, low consumption, can work continuously for 40 hours, equipped with USB cable for convenient charging. Item Type: Optical Power Meter Material: ABS Red Light Detection Distance: 15km Power Supply: 1 x 650mah 3.7V Lithium Battery (built in battery) Wavelength Range: 850-1650nm Standard Wavelength: 850nm, 980nm, 1270nm, 1300nm, 1310nm, 1490nm, 1550nm, 1577nm, 1625nm, 1650nm 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 1 x Optical Power Meter 1 x User Manual 1 x USB Cable 1 x Hanging Rope