The 4.3-inch capacitive touch screen makes the operation more sensitive. 3.7V/4000mAh lithium battery, continuous use for 11-15 hours 12-in-1 function, integrating optical time domain reflectometer, event map, 10G PON split-wavelength optical power meter, end status verification, multi-core test, stable optical source, optical power meter, optical loss test, RJ45 network cable length, RJ45 line sequence test, RJ45 network cable search, fiber end detection, wireless charging and other functions. One-button operation, automatic analysis and OTDR user interface tailored for different skill levels. Very short event dead zone (3.0m) and attenuation dead zone (8.0m). 2.5mm universal interface, compatible with APC&UPC SCFCSTLC connectors, Manufacturer: OJIIPOP