9 in 1 OTDR Fiber Optic Tester OPM VFL LTDR PON Optical Fiber Cable Tester with Line Finding Tool 100‑240V US Plug Item Type: OTDR Fiber Optic Tester Material: ABS Model: 1550 PON OTDR Function: Laser Tube: 1550NM 1610NM OTDR Blind Zone: 3 Meter (Event), 10 Meter (Attenuation) Test Pulse Width: 10 30 100 300NS or 1 3 6US Test Length: 60KM (Event), 30KM (Attenuation) Scattering Depth: 20DB (6US) Measurement Resolution: 0.6 Meter Standard Optical Power Meter: Wavelength Range: 800 to 1600NM, SC Interface Test Range: -70 to +6 (-50 to +26 Broadcasting Version) Red Light Source: Operating Wavelength (nm): 650nm Output Power (mw): 10mw Optical Loss Test Function: Test Range: 0-30DB Output Power: 10% LTDR Test: Test Length: Default 200 Meter Test Function: Measure Network Cable Breakpoint or Short Circuit Point Line Finding Function: Test Method: Audio Ultra Audio Testing Test Range: Between 12 and 36 PON Power Meter: Test Interface: ONU OLT Test Port Test Function: Verify and Check the Fiber Situation of Modem Line Test: Test Function: Network Cable Loop Resistance Measurement, Network Cable Line Sequence Display Instructions: Display 0K Normal, Display X Fault Other Functions: Host Battery: Lithium Battery x 1 (4000mAH) (Built in) Line Finder Battery: Lithium Battery x 1 (1000mAH) (Built in) Temperature Conditions: -10℃ to +50℃ (Operating), -25℃ to +70℃ (Storage)