Wavesplitter SFP port blockers protect network access and system security from unauthorized personnel insert cable into SFP port. It also works as a port saver or as a mark showing inactive ports. It is simple to use, easily plug the blocker into the SFP female port then no SFP modules are available to plug in anymore. When removing the blocker, insert the key with the corresponding color of the blocker into the blocker by following the arrow instruction. With the key’s special structure, turn the key to the right position then pull it out to remove the blocker. Wavesplitter SFP port blockers is a small product but playing an important role especially when information security receives more and more attention.