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 Reflectometer Mode: AUA28U Joint Type: UPC OPM:-70 to +10dBm Material: ABS Wavelength: 1550nm (20dB) Dynamic Range: 20dB Measuring Distance: Approx. 0 to 60000m / 0 to 196850.39ft Fiber Optic Connector Type: 9/125 m SM Unit: tester, inch, mile Reflection Blind Area: Approx. 2m / 6.6ft Data Storage: 200 groups Display: 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 times Visual Fault Locator Wavelength: 650nm Output Power: Greater than or equal to 10mW Mode: CW, 1Hz, 2Hz Optical Fiber Type: SM, MM Optical Power tester Measuring Range: - 70 to +10dBm Wavelength Range: 800 to 1650nm Calibration Wavelength: 850, 1300, 1310, 1490, 1550, 1625 Detection 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