Most of Reolink PoE cameras and WiFi cameras are standalone models, but the following models can't work without an NVR: B400, B800, D400, D800.
To find out the model number of your cameras on your NVR, please refer to the following steps.
Step 1. Click the icon to go to the Menu page of the NVR, then choose IP channel to proceed.
Step 2. Select the camera from the channel list, then click Detail.
Step 3.Then you will see the camera's model, hardware version, firmware version.