Optical Time Domain Reflectometer OTDR 4 in 1 Optic Fiber Tester 3.97in 0‑60KM Range EU Plug 100‑240V Item Type: Optical Time Domain Reflectometer Model: AUA28U Joint Type: UPC OPM: -70 ~ +10dBm Material: ABS Wavelength: 1550nm (20dB) Dynamic Range: 20dB Measuring Distance: Approx. 0 ~ 60000m / 0 ~ 196850.39ft Fiber Optic Connector Type: 9/125 μ m SM Unit: Meter, inch, mile. Reflection Blind Area: Approx. 2m / 6.56ft Data Storage: 200 Groups Display: 3.97in. Resolution: 800 x 480pixels IPS touch 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:>=10mW Mode: CW, 1Hz, 2Hz Optical Fiber Type: SM, MM Optical Power Meter: Measuring Range: -70 ~ +10dBm Wavelength Range: 800-1650nm Calibration Wavelength: 850nm, 1300nm, 1310nm, 1490nm, 1550nm, 1625nm. Detection Type: InGaAs