How to enable voice notification?

To enable voice notification,

1. Tap QR at the bottom of your app home screen.
2. Tap Manage QR.
3. Select the relevant QR code and tap Add Notification Receiver.
4. Enter the mobile number you want to link the QR code with.
5. Enter the OTP sent to the number you’ve entered.
6. Tap Confirm.

Related question
How do I remove an email ID or mobile number linked to a QR Code?