Doorbell gen 2 mounting height confusion, 1.2m from middle of doorbell?

Hi All I've read the link here https://support.ring.com/hc/en-gb/articles/360040763812-Proper-positioning-for-your-Ring-Video-Doorbell-2nd-Generation- The mounting height is confusing me, I originally read it as the bottom of the doorbell should be 1.2m from the ground, however this picture from the link above:  shows the 1.2 metres measured almost at the middle of the doorbell, is that correct? Advice appreciated :slight_smile: