Step 1: Pust right button in mouse.

Step 2: Click “Menu”.

Step 3: Drow your pattern.

Step 4: Click “Maintenance”.

Step 5: Click “System Upgrade”.
Step 6: Click “Cloud Upgrade” for check and upgrade firmware automatically.
Step 7: Click “Check for Update”.
Step 8: Or you can upload the firmware manually by click “Local Upgrade”, input your flash drive in NVR and then select firmware file in your flash drive.