Feature:1. [OTDR Fiber Optic Tester] The fiber optic tester features 1310 1550nm dual wavelength, 24dB 22dB dynamic range, 10m to 60km test range, suitable for G.652 SM fiber.2. [Multi Function] Built in OTDR, event map, power meter, light source, VFL, cable length measuring tool, cable tracking tool, and RJ45 sorters, offering comprehensive functionality.3. [Practical Features] The optic fiber cable tester could help evaluating the construction and maintenance of FTTX and access networks, identifying fiber breaks, measuring cable lengths, and calculating relative light electrical loss.4. [High Resolution Display] With its 3.5 inch colour LCD screen, the OTDR tester provides a clear and intuitive display that enhances user experience and facilitates detailed analysis.5. [Long Lasting Battery] Powered by 3.7V 4000mAh lithium battery, the optical time domain reflectometer delivers a stable power supply for reliable and uninterrupted operation.Specification:Item Type: Fiber Optic TesterMaterial: ABSModel: NF 981Wave Length: 1310 1550nm Dual WavelengthDynamic Range: 24dB 22dBFiber Type: G.652 SM FiberEvent Blind Zone: 10mAttenuation Blind Zone: 15mTesting Range: 10m to 60kmPulse Width: 5ns to 10usTesting Accuracy: (1m+Sampling Interval+0.005%xTesting Distance)Loss Accuracy: 0.2dB/dBSampling Points: 16k to 128kSampling Resolution: 0.05m to 8mReflection Accuracy: 3dBScreen: 3.5 Inch Color LCDData Interface: MicroUSBExternal Storage: Small Memory Card (Small Memory Card Not Included)Power Supply: 3.7V Lithium Battery x 1(4000mAh) (Built in)Operating Temperature: -10 to +50Storage Temperature: -40 to +70Relative Humidity: 0 to 95% Non Condensing.Package List:1 x Fiber Optic Tester (Small Memory Card Not Included)1 x User Manual 1 x SC Connector 1 x USB Cable 1 x Plug