2 External button for voice recognition
Any external button compatible with your device can be used to trigger voice recognition. The button just needs to send a keyboard shortcut to IGOOR. The default keyboard shortcut is CTRL+K, but you can change it at any time in:
Settings > Home > Voice recognition > Configure voice recognition
Click on the text field:

And click your external button. The key combination sent by your external button will appear in the text field. Save the settings.
Where to buy the button / external cable
The button we use for our tests can be found here:
https://fr.aliexpress.com/item/1005007960164925.html?gatewayAdapt=glo2fra
For a few euros. Availability and prices may vary.
The button must be connected to the tablet / computer via a cable (USB-C USB-C or USB-C USB-A). Check the availability of a USB-C or USB-A port on your device before buying the cable.
These cables are widely available commercially; any USB-C cable (USB-C on both ends) will work if you already have one at home, for example:
https://www.amazon.fr/Amazon-Basics-tablettes-ordinateurs-portables/dp/B01GGKZ2SC/?th=1
IMPORTANT: IGOOR is not affiliated with AliExpress or Amazon. These links are provided for informational purposes.