Hardware menu of Gurtam website

Hi There

As a great resource for choosing right devices we all check gurtam.com time to time. There is an option to filter devices by features in Wialon. The problem is that these data are not totally accurate or there is a logic behind categorizing devices that we (at least me) are not aware about. In example today I filtered AVL devices by Accelerometer function and couldn't find TT5300 device there. We all know that TT5300 has internal accelerometer. First i thought webside need more time to load more device but the last result was same as screenshot.
Can anyone explain this?