Most audio gear is not wireless, it is just old. A television with only a headphone jack, a car stereo from 2013, a treadmill with a 3.5 mm socket, an in-flight entertainment screen. A Bluetooth adapter sits between that socket and your headphones and removes the cable, without replacing the device.
This one is a transceiver, which means it works in both directions: it can send audio out of a wired source, or receive audio into a wired speaker. Getting that direction right before you plug anything in is the whole trick.
Transmit or receive: the one thing to get right
| TX mode (transmit) | RX mode (receive) | |
|---|---|---|
| What it does | Sends audio from a wired device to Bluetooth headphones | Takes audio from a phone and plays it through a wired speaker |
| Plug into | TV, plane screen, treadmill, PC, game console (audio out) | Car stereo, home amplifier, old speaker (audio in) |
| Pair with | Your Bluetooth headphones or earbuds | Your phone or tablet |
| Extra | Two pairs of headphones at once | Hands-free calls through the car speakers |
The switch on the side sets the direction. If nothing happens after pairing, nine times out of ten the switch is in the wrong position, not a faulty unit.
Using it on a television
This adapter takes analogue audio through a 3.5 mm plug. That is the right tool for a TV with a headphone jack, which includes most sets built before 2018 and a surprising number built after. It is the wrong tool for a TV that only offers optical output: there is no optical socket here, and no converter in the box. If your set has no headphone jack, the wireless headphones in our TV headphones collection ship with a transmitter that accepts optical, RCA and coaxial.
One quirk worth knowing: plugging into a TV's headphone jack usually mutes the built-in speakers. If two people watch together and only one wears headphones, that is a problem, and the fix is a speaker beside the chair rather than an adapter.
Two pairs of headphones at once
In transmit mode the adapter can serve two sets of Bluetooth headphones simultaneously, so a couple can watch the same film at two different volumes. This is the feature that makes it useful in a household with one hard-of-hearing viewer and one person with normal hearing, without buying a second transmitter.
aptX, latency, and what AirPods actually get
The chip is Qualcomm Bluetooth 5.2 and it decodes SBC, AAC, aptX, aptX Low Latency, aptX HD and aptX Adaptive. That list matters less than most product pages suggest, because the codec has to exist at both ends. Low-latency aptX needs aptX Low Latency in the headphones too; with AirPods, which are AAC only, you get AAC and standard Bluetooth latency of roughly 100 to 200 ms. For television that shows up as a slight lip-sync gap, which most people adapt to within minutes but lip-readers do not.
Two-pair sharing and the lowest latency do not always run at the same time. If sync matters more than sharing, use one pair of aptX Low Latency headphones.
Battery and travel
A 300 mAh cell gives about 12 hours of playback, 30 days of standby, and a full charge in 1.5 hours over USB-C. Ten to fifteen minutes on the cable buys roughly two hours, which covers the gap between a delayed boarding call and the end of a long-haul film. The box includes a dual 3.5 mm airline adapter, because aircraft seat sockets are the one connector that never standardised.
Paired devices are remembered and reconnect on power-up, so the adapter lives in a bag without being re-paired every trip.
Frequently asked questions
Will it make my old TV Bluetooth?
Yes, if the TV has a 3.5 mm headphone output. It sends that audio to any Bluetooth headphones. It cannot add Bluetooth to a TV that only has optical or HDMI output.
Can I use it in the car?
Yes, in receive mode. Plug it into the car's AUX input and stream from your phone, which is useful for older vehicles with no Bluetooth head unit. Incoming calls route through the car speakers.
Does it work with AirPods?
Yes, in transmit mode, over AAC. You will not get aptX benefits because AirPods do not support aptX.
Will two people hear the same audio at the same volume?
No. Both headsets receive the same stream, but each one uses its own volume control, which is exactly what you want when one listener needs more gain.
How far does it reach?
Around 10 m of open space, less through walls. It is a room-scale device, not a whole-house one.
Which product solves your problem
If the goal is private TV listening with the sound in sync, this adapter is the workaround; a headset with its own 2.4GHz transmitter is the better answer, and the over-ear TV headphones cover that. If the goal is turning a wired speaker or an old car stereo into something a phone can stream to, this is the right purchase. If the goal is a room-level speaker for someone who will not wear anything, start with the seniors speaker collection instead.