Features Eliminate Dead Zone: Make up for the blind spot of OTDR test, possessing small size, light weight, and easy portability. Press Design: Spring mechanism for easy jumper release and storage, preventing clutter. Applicable Scenario: Measure loss and reflectivity of near end connections, and remote lossless insertion of fiber optic lines using OTDR. For Single Mode: Utilizes SCUPC to SCUPC single mode connector, suitable for 1310/1550nm single mode cable. Package Include: Comes with 2 accessories and 1 lanyard for easy installation and use. Specification: Item Type: OTDR Launch Cable Box Connector: SCUPC to SCUPC single mode Package List: 1 x Extension Box 2 x Accessories 1 x Lanyard Note: Most of the line length of the product is bare fiber, can not be removed, only about one meter at both ends of the interface pigtail. Package List 1 x Extension Box 2 x Accessories 1 x Lanyard