Thanks for reaching out to us, please see this page for limit of different tier and features - https://learn.microsoft.com/en-us/azure/ai-services/speech-service/speech-services-quotas-and-limits
As a summary, you can take a quick look at below -
I hope this helps, please let me know if you need anything else.
Regards,
Yutong
-Please kindly accept the answer if you feel helpful to support the community, thanks a lot.