AVer DL30 Manuel D'utilisation page 16

Audio Input Connection
Connect the audio device for audio receiving.
[Note]
1. Line input level: 1Vrms (max)
2. Mic input level: 50mVrms (max); Supplied voltage: 3.3V
3. Because video conferencing software such as Google Hangouts (Windows), Skype (Mac), or
Teams (Windows and Mac) can automatically adjust volume, the user might experience
randomly unstable volume while using the camera.
Microphone
Audio mixer
7