All Reolink NVRs and Cameras except battery-powered ones.
Note: Please make sure you already download the firmware from Reolink Website and unzip the .pak file before upgrading.
Step 1. Launch the Reolink Client and log in your cameras/NVR, then go to "Device Settings"->"System"->"Maintenance" page.
Step 2. Click "Upgrade" to upgrade the camera, select the correct upgrade file and then click upgrade to start.
*You may check/uncheck "Update Configure File" to delete/keep it.