can measure 8 standdard wavelengths 850/980/1300/1310/1490/ 1550/1625/1650nm , test range: -70dBm~+6dBm, 1mw red light source.Support lighting,Support automatic shutdown,Support backlight selection, Support wavelenghth memory function,Support user calibration.Support /SC/ST universal interface,Support RJ45 testing,Support simultaneous disply of linear mW and non-linear index dBm.The light power meter & VFL ,Test precision, fine workmanship, easy to carry,completely replace the optical power meter and red pen 2 products.Accuracy: +/-0.05dBDisplay resolution:mW:0.1% ,dBm:0.01dBmWorking temperature:-10~+60CelsiusStorage temperature :-30~+70CelsiusAuto off time:10MinBattery continuous operating time:greater or equal to72hWeight: 140gcolour:OrangeMaterial:plasticsize:11.2x6.6x3cmPackage Contents:1 * optical power meter1 * RJ45 test moduleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.