The HamiltonBuhl SoundKey is the must-have adapter you need in today's ever-changing tech ecosystem! With SoundKey, you can quickly and easily adapt any of your headphones, whether dual plug or single TRRS plug, to a USB plug. The sleek, compact design has three inputs: for 3.5mm TRRS, stereo audio and microphone plugs, in a cinch allowing you to use a headphone or headset with any device, computer, laptop or Chromebook without a headphone jack.