Stable and reliable: The product has good repeatability, wear resistance and good temperature stability. Scope of application: It can effectively suppress ground loop noise, effectively isolate the site from the main control end electrically, and avoid accidental damage to the main control end. Easy to store: small size, easy to carry and store, easy to use, and good performance. Wavelength parameters: SM single mode 1310nm Humidity: 95%RH Insert type: ceramic Storage temperature: -55-85 Attenuation value: 1-20db Bandwidth: +-40nm Different factory batches, if there are differences in color, it not affect the use Color: White Material: ABS Package Contents: 2 x fiber optic adapters Only the above package content, other products are not included. Note: Light reflection 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.