You can upgrade device firmware via the current Web Client.
> Basic Management > Device.
If you set the value to 5, up to 5 devices can be selected for batch upgrade.
The upgradable devices will be displayed.
Select Upgrade Now from the Upgrade Schedule drop-down list to start upgrade.
Select Custom from the Upgrade Schedule drop-down list and then customize a time period to upgrade the selected device(s).
The upgrade task list will be displayed.