Feature:1. Main Application: This tester is used to evaluate FTTx and access network construction and maintenance, identify optical fiber breakpoints, measure optical cable length, and calculate relative optical power loss.2. USB Port: This tester is equipped with an USB data interface, convenient for data transmission, analysis and processing.3. Color Screen: Equipped with a 3.97in color screen, you can easily and clearly monitor the data and make accurate judgements.4. Easy Carrying: Comes with small size and lightweight, you can easily take this tester with you to help with your work.5. Data Storage: The data can be stored by this tester, and you can browse the past detection data for analysis at any time.Specification:Item Type: Optical Time Domain ReflectometerMode: AUA28UJoint Type: UPCOPM:-70 to +10dBmMaterial: ABSWavelength: 1550nm (20dB)Dynamic Range: 20dBMeasuring Distance: Approx. 0 to 60000m / 0 to 196850.39ftFiber Optic Connector Type: 9/125 m SMUnit: tester, inch, mileReflection Blind Area: Approx. 2m / 6.6ftData Storage: 200 groupsDisplay: 3.97 inch Resolution: 800 x 480pixels IPS screen (touchable screen)Power Supply: 7.4V 4400mAh lithium ion battery (shipped with built in battery) can be used for more than 5000 timesVisual Fault Locator Wavelength: 650nmOutput Power: Greater than or equal to 10mWMode: CW, 1Hz, 2HzOptical Fiber Type: SM, MMOptical Power testerMeasuring Range: - 70 to +10dBmWavelength Range: 800 to 1650nmCalibration Wavelength: 850, 1300, 1310, 1490, 1550, 1625Detection Type: InGaAs.Package List:1 x Optical Time Domain Reflectometer3 x User Manual1 x Cleaning Swab Pack1 x CD1 x Lanyard1 x SC Connector1 x FC Connector1 x USB Cable1 x Power Cord1 x Storage Bag