Usage Tips: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 Type: Loopback module Test wavelength: 1310 and 1550 nm Fiber: Single mode 9/125 Connector: LC/UPC 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 Application: fiber laboratory, telecommunication test, FTTX test, patch panel application, equipment interconnection colour: black + blue Material: plastic 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.