If your Windows computer supports Bluetooth, then it must have a Bluetooth chip that provides this capability, typically called as a Bluetooth radio. The Bluetooth version or more specifically the version of the Bluetooth Core Specification supported by this radio determines what features of Bluetooth are available on your computer and for the BT devices you connect to it. But surprise, Windows does not display this Bluetooth version anywhere!
To find out the Bluetooth version:
device managerand go to Bluetooth -> “Name of your Bluetooth radio”. On my computer, the Bluetooth support is provided by Intel and the radio was named Intel Wireless Bluetooth.
HCI 10.256 / LMP 10.256.