What version of the BLUETOOTH standard does my computer support?
Note: Windows 7 does not support Bluetooth Low Energy!
On Windows:
1. Open the device manager on your computer
2. Expand the Bluetooth category
3. Search for your Bluetooth adapter. It may be listed such as « Bluetooth Radio », « Bluetooth Adapter », « Intel(R) Wireless Bluetooth(R) Adapter » or similiar (ignore all listings containing « Enumerator »)
4. Double-click on your Bluetooth adapter and open the advanced tab
5. Locate the first number of the « LMP version » (Link Manager Protocol version) which tells which exact version of Bluetooth is supported.

CadMouse Wireless or CadMouse Pro Wireless (Left) needs at least LMP version 6 (Bluetooth Smart) to work correctly.
| LMP | Bluetooth Version | 
| 0 | Bluetooth 1.0b | 
| 1 | Bluetooth 1.1 | 
| 2 | Bluetooth 1.2 | 
| 3 | Bluetooth 2.0 + EDR | 
| 4 | Bluetooth 2.1 + EDR | 
| 5 | Bluetooth 3.0 + HS | 
| 6 | Bluetooth 4.0 + LE (Bluetooth Smart) | 
| 7 | Bluetooth 4.1 | 
| 8 | Bluetooth 4.2 | 
| 9 | Bluetooth 5 | 
On macOS:
1. Open “About This Mac” from the Apple Menu
2. Click on “System Report…”
3. Select “Bluetooth” in the “Hardware” category
4. Search for the entry “HCI Version” – it must be “HCI Version: 4.0 (0x6)” or higher.
See also: https://www.bluetooth.com/specifications/assigned-numbers/host-controller-interface