How to update firmware:
- Format microSD card using 'System' -> 'Information' -> 'Format SD' menu of the monitor.
- Extract firmware files from the zip archive and put them into the root of microSD
- Perform firmware update using 'System' -> 'Information' -> 'Update' menu of the monitor.

Changes made:
- Video recording duration was reduced (from 60 to 15 seconds)

