Feature 1 Single Mode: Mainly used to compensate for OTDR testing blind spots, suitable for single mode cables at 1310nm 1550nm. 2 Pop Up Cover: Simply press to pop the cover up, then remove the jumper cable and use, press again to close the cover, avoiding clutter! 3 Multi Purpose: OTDR launch cable is used to measure the loss and reflectivity of near end connections, as well as to remotely insert lossless optical fiber lines. 4 Standard Connector: This OTDR extension cable has standard SC UPC to LC APC connector, ensuring easy connection. 5 Compact and Portable: There is no fusion joint in the middle of the optical fiber, which is small in size, light in weight, and easy to carry.Item Type: OTDR Launch Cable BoxMaterial: ABSModel: AUA 20Connector: SCUPC to LCAPC Single Mode Package List1 x OTDR Launch Cable Box2 x Accessories1 x LanyardNoteMost of the wire lengths of the product are bare fibers and cannot be removed. Only about one meter of interface tail fibers are left at both ends.