Group conversations can be anywhere from 15 minutes to 1 hour in length depending on the number of participants. ie. A 1 on 1 Conversation is 15 minutes; a 2 on 1 Conversation is 30 minutes; a 3 on 1 Conversation is 45 minutes etc. It is also possible to create extended 1 on 1 Conversations of up to an hour long or more.