How to use JILONG MIni Optical Power Meter OPM-22

OPM-22, 22V optical power meter, high-precision tester; 6 Wavelengths test, Accurately measure network line sequence and judge signal transmission; Equipped with a high-brightness LED small flashlight, which is convenient for construction in a dark environment; With VFL function, strong and stable light source (22V only); User self-calibration function, accurate and efficient measurement; Pocket design, exquisite appearance, easy to carry.