If you want the NVR to give out an alarm sound when the camera detects motion, or the NVR keeps beeping because of it, you can refer to this article to enable/disable the buzzer.
Applies to: RLN16-410, NVS16, RLN8-410, NVS8, and RLN8-410-E, RLN36, NVS36
You may follow this guide to enable/disable the alarm buzzer (beep).
Step 1. Click the Settings button in the top right corner to go to the settings page.
Step 2. If you want to enable/disable the alarm buzzer, please turn on/off the Buzzer for the NVR, then turn on/off the Buzzer for the camera.
Step 3. If you want to customize different buzzer settings for the cameras, please configure the buzzer schedule to achieve this function.
For NVR with hardware version H3MB16/H3MB02/H3MB06, the buzzer setting interface is slightly different, and it does not have a schedule. You can directly enable the camera's Buzzer to turn it on.