Features: This 20km fiber opticals transceiver module delivers two channel transmission (1x analog video + 1x TTLs signals) for long distance industrial monitoring and data acquisition systems. Featuring fiber interfaces with electromagnetic interferences resistance, it ensures stable 20km signals transmission while maintaining video clarities and TTLs data integrity. for networkings engineers and industrial automation professional requiring robust fiber opticals communication in harsh electromagnetic environments. Perfect for extending surveillances systems across factories, traffics monitoring networks, or remote facilities needing simultaneous video feed and control signals transmission. The plugs and play design with ABS housing simplifies installation in fiber opticals networks, supporting seamless integration with existing interfaces equipment. Specifications: Materials: ABS Size: 50x30x8.5mm Weight: 80g Type: Air End, Ground End, 1Pair (optional) Package Includes: 5Pcs 20km opticals Fiber Module note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.