1、ELIMINATE DEAD ZONE: Launch cable box is mainly used to make up for the blind spot of OTDR test, there is no welding head in the middle of the fiber, possess small size, light weight, easy to carry, very convenient 2、PRESS CAP DESIGN: Press the spring can be used to release the jumper, and press again after the disc is used to hide the jumper to avoid clutter 3、MEASUREMENT OBJECT: OTDR fiber optic transmission cables are used to measure loss and reflectivity of near end connections, as well as remote lossless insertion of fiber optic lines using OTDR 4、FOR SINGLE MODE: SM singlemode launch cable box adopts SCUPC to LCUPC single mode connector, suitable for single mode cable 1310/1550nm 5、PACKAGE INCLUDE: Optic fiber OTDR elminator come with 2 accessories, 1 lanyard, easy for you to install and use Item Type: OTDR Launch Cable Box Connector: SCUPC to LCUPC single mode 1 x Extension Box 2 x Accessories 1 x Lanyard Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.