1. can measure 8 standdard wavelengths 850/980/1300/1310/1490/ 1550/1625nm , test range: -70dBm~+3dBm, 5mw red light source.2. Support lighting,Support automatic shutdown,Support backlight selection, Support wavelenghth memory function,Support user calibration.3. Support //ST 2.5mm universal interface,Support RJ45 testing,Support simultaneous disply of linear mW and non-linear index dBm.4. The light meter & VFL ,Test precision, fine workmanship, easy to carry,completely replace the optical meter and red pen 2 products.Specifications:Calibration 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 light sourceWorking temperature: -10~+60Storage temperature: -25~+70Auto off time: 10MinRed light : Greater than 5mW: 1 x lithium batteryBattery continuous operating time: greater than equal 48hsize: 118 x 68 x 30mmMaterial: plasticcolour: orange+blackPackage Contents:1 x Fiber Optical Meter1 x Micor charging cableOnly the above package content, other products are not included.Note: Light reflection 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.