1. 2.Optical Power Meter and Visual Fault Locator and Network Cable Test. 3.Support three kinds of interface: FC interface, SC interface, ST interface.can measure 8 standdard wavelengths 850/1300/1310/1490/ 1550/1625, 4.support lighting,Support automatic shutdown,Support backlight selection, Support wavelenghth memory function,Support user calibration. 5.Intimately equipped with a small bright LED flashlight for easy inspection in dark environments. Calibration Wavelength: 800-1700nm Detector Type: InGaAs Measurement Range: -70 - 6dBm Accuracy: 0.05dB Display resolution:mW:0.1%,dBm:0.01dBm Working temperature:-10-and60 Storage temperature:-30-and70 Auto off time:10Min Power supply:2 x 1.5V AAA Batteries(not included) Battery continuous operating time:greater than equal 48h size:11.8 x 6.5 x 3cm Material:plastic colour:blue Package Contents: 1 x All-IN-ONE Fiber Optical Power Meter(Not including the battery) 1 x test module 1 x Bolt driver 1 x Lanyard 1 x User Manual Only the above package content, other products are not included. Note: Light shooting 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin