Features: Experience data transmission with SFP Opticals Module, offering 155Mbps speed and compliance with IEEE802.3u standards, for SDH STM1, SONETs OC 3 SR1, and Fast Ethernet applications. Featurings hot swappable SFP packaging, this module allows easy maintenance, upgrades, and expansions without powering down your networking devices, ensuring uptimes and flexibility. for IT professional and Networking administrators who require long distances fiber Opticals communication in their infrastructure. for Backbones Networking connection and long distances campus Networking interconnections, this module supports single mode fiber transmission over distances 2/20/40/80/100KM. with full duplex communication capabilities, this Opticals transceiver module enhanceds data transfer efficiency by enabling simultaneous bidirectional data transmission, optimizing the use of fiber bandwidth resources. Specifications: Materials: Metal Size:61mm/2.4inch Styles: 2KM, 20KM, 40KM, 80KM, 100KM(optional) Package Includes: 1PC SFP Opticals 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.