You may follow the steps below to adjust the alarm and speaker volume for your camera via Reolink App.
Applies to: Duo PoE, Duo WiFi, Trackmix PoE, Trackmix WiFi
Step 1. Launch Reolink App and log in to the camera, then go to Device Settings -> Device Volume page.
Step 2. Adjust the alarm and speaker volume according to your needs. You can tap Volume Test to hear the sound.