AudioQuest RJ45 Noise-Stopper Caps (Set of 4)
 
AudioQuest RJ45 Noise-Stopper Caps Fit Over the Unused RJ45 Inputs and Outputs of Your Gear: Simple Devices Block Noise from Entering Active Circuit and Protect Against Dust
 
Block RFI and EMI noise from entering the active circuit of the unused RJ45 inputs and outputs on your audio/video gear with AudioQuest RJ45 noise-stopper caps. A simple, easy, effective, and cheap upgrade, these caps fit right over the unused ins/outs also protect against dust and corrosion.
 
AudioQuest's RCA noise-blocking caps have been in use for decades. These apply the same concept to RJ45 ins/outs. You'll hear (and see) the difference! (Sold in sets of four.)