P4459A HP 8-Port Fiber Loop Switch

Voodoo Lab HEX True Bypass 6-Loop Audio Switcher Audio Switcher With 6 True-Bypass Audio Loops, Silent Switching With Output Buffer, And MIDI I/O

ALFA 5-Port Unmanaged 2.5G Switch, 5 X 2.5GBASE-T Ports, Loop Detection And Fanless Design(AGS05-2.5GL)