It’s impossible to tell if an IP camera has audio just by looking at it. You should ask the security camera company staff directly. Please be aware that state laws have strict legislation on audio recording, and one person must know about the video recording taking place. If audio recording is not allowed under certain circumstances, you should turn off this function.
As you may know, most baby monitors have two-way audio function, so if you want an IP security camera with audio, you can go get a baby monitor directly.
Read also: How to Tell If a Security Camera Is On: 6 Simple Methods