While the small Bluetooth TX/RX (typically selectable) devices, which Damon mentioned, that plug into the headphone jack of your radio do work… please be aware that they typically introduce too much latency between your keying and the CW side tone to be comfortable for most people.?
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However, if you do really fancy the idea of cutting the headphone cord, you can find versions of the TX device and earbuds that can get you about 40ms or less of latency — which I find workable for the CW speeds most people stick to. They must include Qualcomm’s aptX-LL low latency codec at this stage. There are other variants that increase audio quality and dynamic range, and do have a positive impact on latency reduction, but aren’t tuned specifically to minimize latency over Bluetooth like aptX-LL is. Both the TX/RX dongle and the headphones can be had for around $45 all-in. But you’ll be very limited on earbud options. I have the below earbuds and do like them, but they do have a wire that stretches between the two earbuds and lays comfortably on your neck — the buds themselves are very small and light and the battery last a very long time. While there’s no wire between your head and the transceiver or dongle, the little bit of extra wiring that connects the two buds together likely acts as a larger Bluetooth antenna while offloading some of the audio processing. ?
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Oops almost forgot to include the Earbuds product info:
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HomeSpot Neckband Wireless Earbuds aptX Low Latency Bluetooth 5.1 Headphones Qualcomm? CVC? for Gym, Running, Gaming & Meeting Compatible with iPhone, Samsung Galaxy, Google [[[Product name on Amazon]]]