This is the only place you'll see individual speaker volume controls, which unfortunately means there's no quick way to access this feature. (androidcentral.com)
Be aware that some selling descriptions indicate that the bulb can be controlled via smartphone, but this function is for the speaker and speaker volume only. (comparabit.com)
There are buttons for adjusting speaker volume, and there's even a switch that places a physical lens cover over the front - facing camera that's used for video calls. (androidcentral.com)