The ring is gone, but has + - buttons for volume. If you have it hooked up to external sound system you may be better to forego using volume on Dot and use sound system controls instead (particularly if Dot is one of several audio sources). And in addition to voice control there's the Alexa app or optional remote.
Also interesting are the starter kits:
https://www.amazon.com/dp/B01KWCIMHI/