Kaiterra Sensedge Getting Started page 12

The current firmware version of the Sensedge can be seen in the device details
page, as well as several settings regarding firmware updates.
The Sensedge supports over-the-air (OTA) updates, so that the firmware
running on the device may be updated. Firmware updaters make both new
features as well as security upgrades available.
By default, auto-update is enabled, so that upgrades will be automatically
installed when they become available online. It is highly recommended to keep
this setting enabled.
Tapping on the "check" button located next to the current firmware version
will manually check for available updates, and if available, allow them to be
manually installed.
It is highly recommended to keep the Sensedge up to date at all times.