1. 2.can measure 8 standdard wavelengths 850/980/1300/1310/1490/ 1550/1625 , test range: -70dBm~+6dBm, 10mw red light source. 3.Support lighting,Support automatic shutdown,Support backlight selection, Support wavelenghth memory function,Support user calibration. 4.Support FC/SC/ 2.5mm universal interface,Support RJ45 testing,Support simultaneous disply of linear mW and non-linear index 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: plastic Size: 11.8 x 6.5cm Color: Yellow Calibration Wavelength: 800~1700nm Optical Connector: FC/SC/ universal interface Detector Type: InGaAs Measurement Range: -70 ~ 3dBm Accuracy: ±0.2dB Standard wavelength: 850, 980, 1300, 1310, 1490, 1550, 1625nm Display resolution: mW: 0.1% ,dBm: 0.01dBm VFL: 1mW 650nm light source Working temperature: -10~+60℃ Storage temperature: -25~+70℃ Auto off time: 10Min Red light power: 5mW Power: 2 x 7# Battery(without battery) Battery continuous operating time: equal 48h Package Contents: 4 x Fiber Optical Power Meter 4 x Rope Only 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.