https://ring.com/support/articles/p9go2/adjusting-the-volume-on-your-ring-devices
Adjusting the volume on your Ring devices
Adjust the volume on your Ring video doorbell, security cameras, and Chimes to the sound level that is right for you.
adjusting the volumeringdevices
https://www.htc.com/uk/support/htc-u24-pro/howto/adjusting-volume-and-sound-settings.html
HTC U24 pro - Adjusting the volume and sound settings - HTC SUPPORT | HTC UK
adjusting the volumesound settingshtcu24pro
https://www.htc.com/us/support/htc-5g-hub-sprint/howto/adjusting-the-volume.html
HTC 5G Hub (Sprint) - Adjusting the volume - HTC Support | HTC United States
adjusting the volumehtc5ghubsprint
https://www.htc.com/eu/support/htc-u11/howto/adjusting-volume-and-sound-settings.html
HTC U11 - Adjusting the volume and sound settings - HTC SUPPORT | HTC European Union
adjusting the volumehtc u11sound settings
https://www.htc.com/eu/support/htc-u23-pro/howto/adjusting-volume-and-sound-settings.html
HTC U23 pro - Adjusting the volume and sound settings - HTC SUPPORT | HTC European Union
adjusting the volume