1.100% 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 wavelengths850/1300/1310/1490/ 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: 800~1700nmDetector Type: InGaAsMeasurement Range: -70 ~ 6dBmAccuracy: 0.05dBDisplay resolution:mW:0.1%,dBm:0.01dBmWorking temperature:-10~+60Storage temperature:-30~+70Auto off time:10MinPower supply:2 x 1.5V AAA Batteries(not included)Battery continuous operating time:greater than equal 48hsize:11.8*6.5*3cmMaterial:plasticcolour:bluePackage Contents:1 * All-IN-ONE Fiber Optical Power Meter(Not including the battery) Random 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.