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My Chromebook has Bluetooth, but as of writing, ChromeOS does not support HSP or A2DP, so I cannot play music or record audio through my Bluetooth wireless headset.

I very much would like to be able to use my headset for something like Hangouts, so I can talk and hear through my heads.

The Chromebook does have a TRRS headset jack, which works just fine, so I figured there'd be a device that could interpret Bluetooth as analog, and vice versa. There do exist many devices that either receive or transmit audio over Bluetooth when plugged into a 3.5mm jack, and some devices that purport to do both, but I have not been able to find a device that can transmit and receive at the same time.

My question for you is thus: does there exist a device that I can buy that will plug into the TRRS jack and be able to connect via Bluetooth to my wireless headset, using HSP or something like that.

Worst case, I could try to hook up a TRRS splitter that's male TRRS to two female TRS and then hook up a Bluetooth transmitter to the audio TRS and a Bluetooth receiver to the mic TRS, and then tell my headset to receive from the former and transmit to the latter, but that will require several pieces of hardware, and I'm not sure if there would be some weird lag between the transmit/receive that would cause calls to be terrible.

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up vote 1 down vote accepted

Found a solution!

I was in the same boat and extensively researched various Bluetooth devices for a TRRS-compatible solution. Finally I found this unit, the Plantronics Pulsar 260

While it doesn't say TRRS anywhere, if you look at the way it works, it utilizes a 2.5mm earbud/inline mic combo, rather than the usual 3.5mm audio-only output w/ an internal mic in the hardware.

I ordered this + a 2.5mm to 3.5mm adapter, and it works great with any pair of 3.5mm earbud/mic hardware. Just ensure that the adapter you order has a 4-conductor plug - if you end up with a standard 3-conductor plug you'll lose the mic signal.

Working great for both music listening and phone calls on an iPhone 5S. As is traditionally the case with Bluetooth, music listening is not super crystal clear 100% of the time - but it's stereo and works well.

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My understanding of 3.5mm jack's is that they tend to be serial and transmit data in one direction only, e.g. mic jack vs headphone out jack, so I don't think it would be possible to transmit in both directions.

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But, if that is so, then how come a wired headset will work? – Juniper Belmont Feb 25 '13 at 2:19
TRS audio jacks are output only, TRRS adds a data in channel that can be used for various things like volume and playback control, even microphones. – Thor84no Feb 25 '13 at 8:59

I'm looking for something like this as well (though in reverse) as my car has a TRRS jack in the glove box and I'd rather not mess about with putting my phone in the glove box and plugging it in if I can avoid it. I've found something similar, but unfortunately it's for TRS. It does however imply this should be possible, and it may even be possible to make the TRS plug work with your TRRS jack, it just won't be two-way (and you'll need a converter and my limited experience with those have been universally bad).

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Yes, I have seen that thing on Amazon, and a dozen others like it, but I have yet to see something that's TRRS with Bluetooth both ways, which bugs me. – Juniper Belmont Feb 25 '13 at 21:59

Nolan TxPlus Unversal Bluetooth Wireless Stereo Music and Voice Talk Transmitter Adapter with 3.5 mm Audio Plug

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This should be provided as comment, not answer (with only one link) – Romeo Ninov Mar 4 at 11:11

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