Feature:1. [Main Features] This fiber optic tester combines the features of OTDR, OPM (optical power meter), VFL (visual fault locator), LS Laser Source, Loss, RJ45 Sequence, providing comprehensive testing capabilities for fiber optic networks.2. [Clear Color Display] Equipped with a 3.5 inch color screen, this optical time domain reflectometer offers a clear and easily readable display, ensuring accurate analysis of test results.3. [Extensive Testing Range] The testing wavelength is 1310nm 1550nm, testing range is 5m to 60km, dynamic range is 24dB 22dB (Note: not suitable for testing splitters; for splitter testing, a dynamic range of 42dB or above is required).4. [Internal and External Storage] This OTDR has a micro USB data interface for internal storage, and supports external storage via small memory card (not included).5. [Wide Applications] This OTDR can be used to evaluate the construction and maintenance of FTTx and access networks, identify fiber optic breakage, measure cable length, calculate relative optical power loss.Specification:Item Type: Optical Time Domain ReflectometerMaterial: ABSWavelength: 1310 1550nm Fiber Type: 9/125um Single Mode Connector: FC, SC/PC Dynamic Range: 22/24dB Pulse Width: 10ns to 10us, Auto Event Dead Zone: 3 MeterAttenuation Dead Zone: 10 MeterDistance Measurement Accuracy: (1m+2x10-4xDis)Internal Storage: >600External: Scalable Small Memory Card (Without Card)VFL: 10mWMeasurement Range: -70 to 10dBm OPM Wavelength: 850 Display Screen: 3.5in Color TFT LCD Battery: 3.7V Lithium Battery 2200mAh x 1 (Included)Plug Voltage: 110-240V.Package List:1 x Optical Time Domain Reflectometer (Small Memory Card Not Included)1 x User Manual1 x SC Connector1 x USB Cable1 x Storage Bag1 x Plug1 Pack x Cotton Swab1 x Lanyard