Adjust volume on speaker battery video doorbell

Hello, I love Wyze cam products and I bought battery video doorbell recently. The issue is that the camera will be installed on my apartment door. I need it as discreet as possible. The speaker is loud. When pressing the button, I would like to receive notification on my phone without creating loud chime sound at the door which I find in my situation set up unnecessary. How can I lower or remove the ringing sound when pressing the button or at least lower it ? I appreciate your help. Thank you !