1.100% brand new  2.Optical Power Meter + Visual Fault Locator + 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~+60℃  Storage temperature:-30~+70℃  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*6.5*3cm  Material:plastic  colour:blue  Package Contents:  1 * All-IN-ONE Fiber Optical Power Meter(Not including the battery)  1 * test module  1 * Bolt driver  1 * Lanyard  1 * 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.