Optical power meter can measure 8 standard wavelengths 850/980/1300/1310/1490/ 1550/1625/1650nm , test range: -50dBm~+26dBm, 10mw red light source., Support lighting, Support automatic shutdown, Support backlight selection, Support wavelength memory function, Support user calibration., Support FC/SC/ST 2.5mm universal interface, Support RJ45 testing, Support simultaneous display of linear mw and non-linear index dBm., The light power meter & VFL 15KM ,Test precision, fine workmanship, easy to carry, completely replace the optical power meter and red pen 2 products. Come with English manual, Batteries not included,