If your cameras support the siren function and the NVR uses a new UI, refer to the below steps to turn on the siren for the cameras connected to NVR.
Applies to: RLN8-410 (hardware version NVR_NNT3NA78P / N7MB01 / N3MB01 / N2MB02 / H3MB18), RLN16-410 (hardware version NVR_NNT4NA716P / N6MB01 / H3MB18), RLN4E, NVS4E, RLN36, NVS36, RLN12W, NVS12W, NVS4E, NVS8, NVS12W, NVS16, NVS36, RP-PN8, RP-PN16, RP-N64.
Step 1. Log in to your NVR via Reolink App and go to the Device Settings > Siren page.
Step 2. Switch on the Siren option and set up the Siren Sound and Siren Schedule according to your needs.