1、Application: This time domain reflectometer is used to evaluate FTTx and access network construction and maintenance, identify fiber breaks, measure optical cable lengths, and calculate relative optical power loss. 2、3. 5 Inch Color Display: The screen of this time domain reflectometer is a 3.5‑inch touch screen color display, which is very clear, and the display function is good even in darker places. 3、Multiple Functions: This time domain reflectometer has multiple functions, such as optical time domain reflectometer, optical power meter, stable light source, red light fault location, LED light. 4、Easy To Carry: The small size and light weight of this time domain make it ideal for carrying with you when you go out to work. 5、Support Multi Touch: This time domain reflector supports multi touch, fluent control, dazzling soft light screen, adjustable screen brightness. Item Type: Optical Time Domain Reflectometer Model: AUA 18A Port: APC Material: ABS Stable Light Source Connector: SC, PC Optical Power Meter Connector: SC, FC, ST Stabilized Light Source: 1550nm Optical Time Domain Reflectometer: 0-60km Optical Power Meter: 7 Types of Wavelength 850, 1300, 1310, 1490, 1550, 1625, 1650 LED Illumination Dustproof Interface: SC Interface for Optical Time Domain Reflectometer, 2.5mm Interface for OPM And PFL Display: 3.5inch Touch Screen Display Power Supply: Built In 3.7V 2200mah Lithium Polymer Battery ( Shipped With Built In Battery ) Five Functions: Optical Time Domain Reflectometer, Optical Power Meter, Stable Light Source, Red Light Fault Location, LED Light 1 x Optical Time Domain Reflectometer 1 x Manuals 1 x Plug 1 x USB Cable 1 x CD 1 x Storage Box