1.2.can measure 8 standdard wavelengths 850/980/1300/1310/1490/ 1550/1625 , test range: -70dBm~+6dBm, 10mw red .3.Support lighting,Support automatic shutdown,Support backlight , Support wavelenghth memory function,Support calibration.4.Support //ST 2.5mm universal interface,Support RJ45 testing,Support simultaneous disply of linear mW and non-linear dBm.5.The light power meter & VFL ,Test precision, fine workmanship, easy to carry,completely replace the optical power meter and red pen 2 products.Specifications:Material: plasticSize: 11.8 x 6.5cmColor: YellowCalibration Wavelength: 800~1700nmOptical Connector: //ST universal interfaceDetector Type: InGaAsMeasurement Range: -70 ~ 3dBmAccuracy: 0.2dBStandard wavelength: 850, 980, 1300, 1310, 1490, 1550, 1625nmDisplay resolution: mW: 0.1% ,dBm: 0.01dBmVFL: 1mW 650nm Working temperature: -10~+60Storage temperature: -25~+70Auto off time: 10MinRed light power: 5mWPower: 2 x 7# Battery(without battery)Battery continuous operating time: 48hPackage Contents:1 x Fiber Optical Power Meter1 x RopeOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.