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: plastic Size: 11.8 x 6.5cm Color: Yellow Calibration Wavelength: 800~1700nm Optical Connector: //ST 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 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: 48h Package Contents: 1 x Fiber Optical Power Meter 1 x Rope Only 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.