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. Item Type: Fiber Optic Tester Material: ABS Model: NF 981 Wave Length: 1310 1550nm Dual Wavelength Dynamic Range: 24dB 22dB Fiber Type: G.652 SM Fiber Event Blind Zone: 10m Attenuation Blind Zone: 15m Testing Range: 10m to 60km Pulse Width: 5ns to 10us Testing Accuracy: ±(1m+Sampling Interval+0.005%xTesting Distance) Loss Accuracy: ±0.2dB/dB Sampling Points: 16k to 128k Sampling Resolution: 0.05m to 8m Reflection Accuracy: ±3dB Screen: 3.5 Inch Color LCD Data Interface: MicroUSB External Storage: Small Memory Card (Small Memory Card Not Included) Power Supply: 3.7V Lithium Battery x 1(4000mAh) (Built in) Operating Temperature: -10℃ to +50℃ Storage Temperature: -40℃ to +70℃ Relative Humidity: 0 to 95% Non Condensing 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