Device must be equipped with Bluetooth version 4.0 or higher and support Low Energy mode.
To check your device (for Windows 10), open the Device Manager:
In Properties - Advanced check the LMP version.
- LMP 9.x - Bluetooth 5.0
- LMP 8.x - Bluetooth 4.2
- LMP 7.x - Bluetooth 4.1
- LMP 6.x - Bluetooth 4.0
- LMP 5.x - Bluetooth 3.0 + HS
- LMP 4.x - Bluetooth 2.1 + EDR
- LMP 3.x - Bluetooth 2.0 + EDR
- LMP 2.x - Bluetooth 1.2
- LMP 1.x - Bluetooth 1.1
- LMP 0.x - Bluetooth 1.0b
Also, make sure that in the Bluetooth section there is an element called Microsoft Bluetooth LE Enumerator.
If you haven't Bluetooth section in Device Manager or your device is running Windows 7 or Windows 8.1, you need to use external adapter based on CSR 8510 chip.
Hideez recommends to use Hideez Dongle.
How to install it, you can read here:
How to use Hideez Bluetooth Dongle on Windows
Note, that Hideez can't warrant the correct operating with unapproved Bluetooth adapters.