I've tested the "voice call" feature of the C200 from the app. When I say "hello" into my phone, after a short delay I can hear my own voice back on the phone. Meaning, I say Hello, the C200 speaker...

Let’s say I add a MicroSD card, and enable 24 hour continuous recording. What happens when the memory is full? Does it automatically remove older recording? Or do I need to manually remove files...