Feature: 1. [SCUPC to LCUPC Interface] This OTDR fiber test extension cable features an SCUPC to LCUPC single mode interface, ideal for single mode cables at 1310 1550nm wavelengths. 2. [Compensate Blind Spots] Designed to compensate OTDR testing blind spots, this fiber optic launch cable allows for more accurate measurements. 3. [Wide Purpose] The OTDR fiber launch cable can be used to measure loss and reflectivity of the near end connection, as well as non destructively insert the fiber optic line remotely. 4. [Easy to Use] The cable box is equipped with a convenient press top design, allowing for easy retrieval and concealment of the jumper cable, preventing tangled cables. 5. [Compact and Portable] With a compact size and lightweight design, this OTDR launch cable box is easy to carry and transport, making it a convenient tool for technicians and professionals. Specification: Item Type: OTDR Launch Cable Box Material: ABS Model: AUA 20 Connector: SCUPC to LCUPC Single Mode. Package List: 1 x OTDR Launch Cable Box2 x Accessories1 x Lanyard Note: Most 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.