A. Standard duplex LC connector, bend-insensitive single-mode 9/125 fiber. Duplex clips are easy to insert when holding the connectors together. 100% functional test to performance and integrity. Single-mode 9/125 fiber for testing applications. B. Type: Loopback module; Test wavelength: 1310 and 1550 nm; Fiber: Single mode 9/125; Connector: LC/; Insertion loss: typical: less than or equal to 0.20dB maximum: less than or equal to 0.30dB; Repeatability: less than or equal to 0.10dB; Interchangeability: less than or equal to 0.20dB; Durability: less than or equal to 0.20dB typical change, 1000 plugs; Working temperature: -20 to +70 degrees; Storage temperature: -40 to +85 degrees. C. Application: fiber laboratory, telecommunication test, FTTX test, patch panel application, equipment interconnection; colour: black + blue; Material: plastic. D. Package Contents: 2 x Loopback Adapter. Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.