On Thu, 12/26/2024 9:40 PM, david wrote:
Why does a Bluetooth headset and/or earbuds NOT need a USB transceiver to work perfectly with a Windows 10 laptop - but a Bluetooth mouse needs it?
This is a Bluetooth mouse which needs the little USB transceiver to work. https://www.amazon.com/dp/B0DMK7WV48
This is a Bluetooth headset which works fine WITHOUT needing a USB dongle. https://www.amazon.com/dp/B08WM3LMJF
Likewise a Bluetooth earphone doesn't need a USB dongle to work with a PC. https://www.amazon.com/dp/B0DL4KN99V
Why?
On a Windows 10 computer, you can use Device Manager
to review the hardware contents of your device.
Right-click on Start button, fifth item from the top.
Device Manager.
If you have Bluetooth and/or Wifi devices, they will be listed
in there somewhere.
Some modules, have both Bluetooth and Wifi in the same module.
This is Wifi 2x2 MIMO plus Bluetooth single-antenna. In some
cases, the antennas are efficient emitters at both 2.4GHz and 5GHz.
Or in the case of say, Wifi7, 2.4Ghz, 5GHz, 6GHz.
Wifi ----------- Antenna #1
single-chip -----+----- Antenna #2
|
BT-Host-chip -----+
Any time an item claims it is a Bluetooth Peripheral, the computer
(Host) end, needs a Bluetooth Radio to talk to it. And that could
be a BT nano transceiver, it could be a BT inside a Wifi module.
*******
A dual mode mouse, could have a 2.4GHz signal and a private protocol,
or it could have a 2.4GHz Bluetooth signal and protocol.
On Logitech mice, the nano transceiver was called the Unifying Transceiver.
On some Microsoft mice, the transceiver and the mouse are "paired" so
you don't want to lose the transceiver. They do not pair at runtime,
they are paired at the factory.
It's all wonderfully complicated and a pain in the ass.
In Windows 10 Settings Wheel, there is a "Bluetooth and Devices"
in the settings panel. And that is where some of the pairing
and enabling go on.
Paul
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