The XHO5000 from Shanghai Shinho Fiber Communication is a Optical Time Domain Reflectometer (OTDR) with Event Dead Zone 0.8 to 1 m, Attenuation Dead Zone 4 to 5 m, Optical Wavelength 850 to 1650 nm, Dynamic Range 19 to 45 dB, Pulse Width 3 ns to 20 µs (SM), 3 ns to 2 µs (MM). More details for XHO5000 can be seen below.