Theben TC 649 C Manual page 23

Controls and menu
 Set the desired time.
 Click on Apply.
 Then click Save.
Changing the country and city
 Select a country from the (country) drop-down menu.
 Then select a city from the (city) drop-down menu.
 Click Save.
6.2.3 Update firmware
You can run a device update in this menu. You can run the device update either
online (Internet connection required) or offline (not on mobile devices).

A firmware update can only be carried out via the desktop application.
Online update
 Click on the Check for updates button.
A message appears if an update is available.
 Then click on Start firmware update.
 Press Yes to confirm and carry out the update.
TC 649 C manual 23