1. 2can measure 8 standdard wavelengths 850/980/1300/1310/1490/ 1550/1625 , test range: -70dBm~+6dBm, 10mw red light source. 3Support lighting,Support automatic shutdown,Support backlight selection, Support wavelenghth memory function,Support user calibration. 4Support //ST 25mm universal interface,Support RJ45 testing,Support simultaneous disply of linear mW and non-linear index dBm. 5The light meter & VFL ,Test precision, workmanship, easy to carry,completely replace the optical meter and red pen 2 products. Specifications: Material: plastic Size: 118 x 65cm Color: Yellow Calibration Wavelength: 800~1700nm Optical Connector: //ST universal interface Detector Type: InGaAs Measurement Range: -70 ~ 3dBm Accuracy: 02dB Standard wavelength: 850, 980, 1300, 1310, 1490, 1550, 1625nm Display resolution: mW: 01% ,dBm: 001dBm VFL: 1mW 650nm light source Working temperature: -10~+60 Storage temperature: -25~+70 Auto off time: 10Min Red light : Greater than 5mW : 2 x 7# Battery(without battery) Battery continuous operating time: greater than equal 48h Package Contents: 1 x Fiber Optical 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.