Cable test functionOperation method: Long press UNIT key for 3 seconds to open RJ45 test mode, then press to close RJ45 test modeHigh quality imported headPenetrating farther, longer life.new LED lighting features for dark work environmentCan choose 6 kinds of wavelength:850nm.1300nm.1310nm.1490nm.1550nm.1625nm.Support three kinds of interface: .SC ,STOutgoing maintenance only one machineFunction upgrade 3 in 1Optical Power Meter + Visual Fault Locator + Network Cable TestDIY self-calibrationAccording to the actual test needs self-test parametersAt the same time press the + REF + UNIT button,enter the user mode,the screen displays the letter "CAL"Press the "REF" and "UNIT" keys at the same time to restore the power meter to the factory stateButton UNIT,reducing 0.05dBPress the power button.SavePress REF + UNIT:restore factory settingsPress the key to switch the wavelengthPress REF,increase 0.05dBSet the current test result as a reference value,make relative power measurement,the display will show the set DBMDetector type:InGaAsMeasuring range:-70 to +3Uncertainty: 5%Display resolution:linear display,0.1% logarithmic display:0.01dBmRed working wavelength:650nmRed power:more than 5mWOperating temperature:-10 ~+60 Storage temperature:-25 ~+70 Automatic shutdown time:10minBattery continuous working hours (h):more than equal 48Product Size:118 * 68 * 30mmPower:1.5VAAA * 2(Not included)colour:yellowMaterial:plasticPackage Contents:1 * Optical Fiber Tester1 * network cable portOnly 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.