Check the listing for details. Optical Time Domain Reflectometer OTDR with VFL Visual Fault Locator Function. Condition: New. Listed at 258.00 USD. New Mini OTDR Joinwit Optical Time Domain Reflectometer OTDR Built-in VFL Visual Fault Locator Function PLS NOTE IT.-----The device have two type--- 1550nm and 1310nm. So when you make order pls tell me which one type do you need ? Optical Fiber Ranger Optical Time Domain Reflectometer Mini OTDR 1550nm/ 1310 Mini OTDR is the most portable test instrument in the industry. It adopts the OTDR technical principles and integrates the powerful analysis software, which enables the fiber ranger detect fiber faults location more accurately. Features Portable, rugged, lightweight; Easy to use. More accurate testing results and better repeatability. Up to 8 fiber faults can be detected in each measurement. Automatic Pulse Width Control design to ensure a convenient operation. Easy to identify the faults location. Built-in visual fault locator (VFL), conveniently to find the faults in dead zone. Dust, water and shock proof, des igned for field use Long battery life, up to 5000 measurements operation. Applications Testing the distance of the fiber and identify the faults location in the fiber link. Locates reflective and non-reflective breaks in the fiber network. Inspection of fiber repair and maintenance. Specifications Model Wavelength 1550nm/1310 Type of fiber 9/125um SM Fiber Connector FC、SC/PC Dynamic Range 22dB Pulse Width 10ns~ 2.5us，Auto Measurement m Event blind zone 3m Attenuation blind 10m Range accuracy ±（1m+2×10-4×distance） VFL ≥1mW Power Supply 3pcs of Dry battery Battery Work time ≥2000 times measure Save Data ＞500 Work Temperature -5~40℃ Save Temperature -10~60℃ humidity 0~85%（no condensation）