Feature: 1. USB Data Interface: This optical time domain reflectometer uses a USB data interface, which can be used to connect to other devices for further data analysis. 2. 3.5 Inch Touch Display: This optical time domain reflectometer adopts a 3.5 inch touch display, which is easy to operate and can clearly display a variety of data. 3. Multifunctional: This optical time domain reflectometer is multifunctional with OTDR, event reflector, optical power meter, visual fault locator, stabilized light source, ethernet cable distance, ethernet cable tracer, rj45 ethernet cable sequence, and LED light function. 4. Excellent ASB Material: This optical time domain reflectometer is made of excellent ABS material for the shell, which is sturdy and wear resistant, not easy to be damaged, and has a long service life. 5. Wide Application: This optical time domain reflectometer can be used to evaluate FTTx and access network construction and maintenance, identify fiber breaks, measure cable lengths, and calculate relative optical power loss. Specification: Item Type: Optical Time Domain Reflectometer Material: ABS Battery: Lithium Battery x 1 (4000mah) ( Shipped With Built In Battery ) Test Wavelength: 1310nm or 1550nm??20nm Fiber Type: G.652 Single Mode Optical Fiber Dynamic Range: 24dB, 22dB Event Blind Zone: Approx. 3m/9.8ft Attenuation Blind Zone: Approx. 8m/26.2ft Measurement Range: Approx. 3m-60km/9.8-196850ft Pulse Width: 3ns-10us Ranging Accuracy: ??( 1m+Sampling Interval+0.005%??Test Distance) Linearity: ??0.2dB/dB Sampling Points: 16k-128k Sampling Resolution: 0.05m-8m Reflection Accuracy: ??3dB Data Storage Internal: ??600 items, External: Expandable Memory Card (not included) Laser Safety Level: Class II File Format: SOR Standard File Format Optical Connector: FC, UPC (SC, ST Interchangeable) Wavelength Range: 800nm-1700nm Optical Connector: Universal Connector FC, SC, ST Measurement Range: -50dBm-+26dBm Uncertainty: ??5% Frequency Recognition: CW, 270, 330, 1k, 2kHz Laser Type: FP LD Output Wavelength: 1550nm??20nm, 1310nm, 1550nm??20nm Output Power: ??-5dBm Modulation Frequency: 270, 330, 1k, 2kHz Stability: CW, ??0.5dB/15min ( Tested After 15min Warm Up ) Optical Connector: FC, UPC ( Interchangeable SC, ST ) Working Wavelength: 650nm??20nm Output Power: ??10mw Operating Mode: CW, 1Hz, 2Hz Optical Connector: Universal Connector FC, SC, ST Display: 3.5 Inch Color LCD Data Interface: Micro USB Expandable External Storage: Memory Card ( Shipped Without Card ) Battery Life Standby: >20 Hours, Measurement: >12 Hours Operating Temperature: -10??C-+50??C Storage Temperature: -40??C-+70??C Relative Humidity: 0-95% No Condensation. Package List: 1 x Optical Time Domain Reflectometer1 Pack x Cotton Swab1 x Plug1 x USB Cable1 x Manual1 x Converter Head Note: 1. To reduce the risk of fire or electric shock, do not expose the unit to thunderstorms or wet conditions.2. To prevent electric shock, do not open the enclosure, and it must be serviced by qualified persons designated by the manufacturer.