Can You Make Headphones Wireless?

Yes, you can make headphones wireless. You can buy a bluetooth transmitter/receiver dongle to turn wired headsets wireless. It works best on headsets where you can remove the wire and just connect the dongle right to the headset. The dongle can then connect to literally any bluetooth device as if it were a normal bluetooth headset.

Bluetooth Receiver Options

You can buy a bluetooth receiver, attach it to the top of your headset and use your PC as the transmitter. For example, if you have a headset like the Sennheiser HD 560S, you could mount a device like the FiiO BTR3K to the side or top of the headset and connect a 2.5mm to 3.5mm short cable — short enough to where it would only have enough length to reach the receiver. The BTR3K is great for this kind of setup and does work with a computer running Windows 11.

• Hagibis Bluetooth 5.0 Transmitter Receiver — this compact device offers excellent connectivity and latency response due to the inclusion of Bluetooth 5.0, along with aptX HD and aptX. Plus, because the end is flexible, you can mold it along your headphones for a clean look.
• Apekx Clip Bluetooth 4.1 Audio Adapter — go wireless from your phone and still maintain full playback controls. You'll be able to take phone calls and listen to your audio with ease for up to 7 hours before needing to recharge the adapter.
• Mpow Steamboat Mini Bluetooth 4.0 Music Receiver — from its long-lasting battery to the wide range of devices it works with, the Mpow Steamboat is an excellent addition to not only your wired headphones but also other Bluetooth-deficient devices.

Bluetooth Version and Codec Considerations

Get a good small BT 5.0+ dongle and you will be good. The Bluetooth version is particularly important — old BT uses lots of battery and is laggier, so get the newer ones. The recent updates have been particularly good.

LDAC / aptX

Check out that your transmitter and receiver support either LDAC or aptX — that'll get you better sound quality as those codecs have higher bandwidth than the SBC codec almost everything has.

SBC

The baseline codec found on almost all Bluetooth devices. Lower bandwidth than LDAC or aptX.

Downsides of Bluetooth for Headphones

The biggest downsides are there is noticeable lag unless you have a good dongle, and most dongles are cheap so expect that to be your main bottleneck. With Bluetooth there's the inevitable downsides of having to charge the receiver, latency issues, as well as quality drop if you can't get a BT setup supporting stuff like LDAC. If you are using an external dongle for a PC, will there be a noticeable downgrade in audio quality and will there be any noticeable latency — these are real concerns depending on the quality of the dongle used.

2.4GHz Audio Transmitters

1. 2.4GHz is live music/pro audio only — the gear is expensive and not plug-and-play unless you have recording studio gear. Its main benefit is low latency and you don't need to hold a microphone.
2. The Sennheiser Flex 5000 is one available 2.4GHz option. However, the Flex doesn't allow you to use the microphone on your headset. If you are located in Europe you can find the Flex 5000 a bit cheaper.
3. A cheaper alternative found on AliExpress is the "Aixxco Wireless 2.4G HiFi/No Delay Audio Transmitter," though it is described as cheap Chinese hardware rather than a recommended option.

USB-C to 3.5mm Adapter

You'll maintain excellent sound quality and expand the number of devices you can use your favorite wired headphones with by picking up a USB-C to 3.5mm adapter. For example, the Google USB-C to 3.5mm adapter is available at $12. This is useful if the audio 3.5mm jack of a laptop is chipped or damaged, resulting in a bad connection — though a cheap USB to 3.5mm adapter from Amazon may result in poor audio quality.

Use Case: Home PC Setup

For home computer use, if your desktop is over by the television which you use as a monitor while you sit about 15 feet away, a wireless setup makes practical sense since keyboard and mice can already be wireless. It's also annoying to take off and hang your headset just to get a cup of water that is 10 meters away. For those who prefer wired for better sound quality but want wireless convenience at the gym or when walking a dog, a Bluetooth receiver attached to over-ear wired headphones is a practical solution. You could also use a device like a Sony Walkman NW-A series as a receiver to your headphones — find a device that supports LDAC over Bluetooth, most Android devices support this, and connect wirelessly that way.