Optical Time Domain Reflectometer OTDR 4 in 1 Optic Fiber Tester 3.97in 0‑60KM Range US Plug 100‑240V Item Type: Optical Time Domain Reflectometer Model: AUA280U Joint Type: UPC OPM: -70~+10dBm Material: ABS Wavelength: 1310/1550nm (24/22dB), 1310/1550nm (26/24dB), 1550nm (20dB), 1610nm (20dB) Dynamic Range: 24/22dB, 26/24dB, 20dB Measuring Distance: Approx. 0 ~ 60000m / 0 ~ 196850.39ft Fibre Optic Connector Type: 9/125 μm SM Unit: meter, inch, mile. Reflection Blind Area: Approx. 2m / 6.56ft Data Storage: 200 Groups Display: 3.97in Resolution: 800 x 480 pixels 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 Fibre Type: SM, MM Optical Power Meter: Measuring Range: - 70~+10dBm Wavelength Range: 800-1650nm Calibration Wavelength: 850/1300/1310/1490/1550/1625 Detection Type: InGaAs Optical Light Source: Emitter: FP-LD Wavelength: 1310/1550nm Output Power: ≥ -5dBm Fibre Type: SM