An update to the firmware for iGS520 systems was released on November 19, 2020. You can use this to update your system software to version 1.05.
Your first GPS Cycling Computer
Your first GPS bike computer, a bike computer that everyone can have. Easy to install and simple to use.
iGS620｜New firmware V1.27
An update of the firmware for iGS620 systems was released in April 2021. You can use this to update your system software to version 1.27.