Feature: 1. HD FULL TOUCH SCREEN: The 3.5 inch HD full touch screen not only delivers clear visuals but also supports multi touch for user‑friendly interactions. The working wavelength of 1550nm allows for an illuminant test. 2. SMALL TESTING BLIND ZONE: With a small testing blind zone, this tester offers a maximum testing range of 80km, making it highly efficient. 3. INTELLIGENT LINK ANALYSIS: The optical time domain reflectometer provides intelligent link analysis and intuitively presents the analysis event, allowing for easy understanding and decision making 4. PORTABLE AND USER FRIENDLY: Compact and lightweight, this OTDR tester is easy to carry around, making it ideal for field work. The smoothly multi touch control and colorful soft light screen, with adjustable brightness, offer a comfortable user experience. 5. COMPREHENSIVE TESTING ABILITY: This device is especially useful for evaluating FTTx and access network construction and maintenance. It can identify optical fiber breakpoints, measure optical cable length, and calculate relative optical power loss, making it a must have tool for network testing. Specification: Item Type: Optical Time Domain Reflectometer Mode: NK2800 Material: ABS Power Supply: Built in polymer lithium battery capacity 2200mah (shipped with built in battery) Optical Time Domain Reflectometer G.652 Single Mode Fiber Wavelength: 1550nm±20nm Maximum Allowable Power for Optical Test: 1490nm less than 10dBm 1577nm is less than 10dBm 1310nm is less than 10dBm 1270nm is less than 10dBm Maximum Dynamic Range: 20dB Minimum Event Blind Area: Approx. 2.5m / 8.2ft Attenuation Blind Area: Approx. 10m / 32.81ft Test Range: Approx. 100m / 328.1ft, 300m / 984.3ft, 500m / 1640.4ft, 1250m / 4101ft, 2500m / 8202.1ft, 5000m / 16404.2ft, 10000m / 32808.4ft, 20000m / 65616.8ft, 40000m / 131233.6ft, 80000m / 262467.2ft Test Pulse Width: 5ns, 10ns, 20ns, 30ns, 50ns, 80ns, 100ns, 200ns, 300ns, 500ns, 800ns, 1μs, 2μs, 3μs, 5μs, 8μs, 10μs, 20μs Range Accuracy: ±(1m+ sampling interval +0.005%× test distance) Refractive Index: 1.00000 to 2.00000 Reflection Accuracy: ±3dB Loss Measurement Mode: 4 point method, 5 point method Optical C: SC PC Optical Power Meter Wavelength Range: 800nm to 1700nm Wavelength Calibration: 850, 980, 1300, 1310, 1490, 1550, 1625, 1650 nm Measuring Range: 50 to +26dBm(standard) Recognition Frequency: CW, 270Hz, 330Hz, 1kHz, 2kHz Resolution: 0.01dB Uncertainty: ±5% Optical Connector Universal Connector: FC SC ST Stabilized Light Source The output wavelength is consistent with the OTDR output wavelength Laser Type: FP LD Output Power: ≥-5dBm Stability: CW,±0.5dB/15min (test after 15min preheating) Optical Connector: SC PC Visual Fault Location Operating Wavelength: 650nm±20nm Output Power: ≥10mW Working Mode: CW, 1Hz, 2Hz Optical Connector: Universal connector . Package List: 1 x Optical Time Domain Reflectometer1 x USB Cable1 x Power Adapter1 x Carrying Case5 x Cleaning Pads1 x CD