ETU-LINK 25G SFP28 optical module is a type of optical module with a transmission rate of 25Gbps, which can be backward compatible with 10G speed. It adopts the SFP28 (Small Form-factor Pluggable 28) packaging form and is mainly used in scenarios such as 25G Ethernet switches, 100G (4x25Gbps) Ethernet, routers, enterprise networks, and telecommunications networks for data transmission.