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Sale!NK3200 Mini-Pro OTDR combine 9 functions with highly integrated OTDR, Event maps, Stable Light source, Optical power meter, Visual fault locator, cable sequence proofreading, cable length measurement and lighting functions. It could quick detection of breakpoint, universal connector, 600 internal storage, TF card, USB data storage and built-in 4000mAh lithium battery, USB charging. It is a good choice for long term field work.