[2019] Inventory Screen Icons - Noob Question

I realize this is a super noob question, but what do the icons below the level circle represent - the red circle, the blue "home plate" and the battery looking icon? I can't seem to find anything on the intra-webs. Thanks.

Edit - I now see what they mean, but I don't know how the integers at the bottom correlate to the numbered/percentage attributes on gear. I guess they are multiplying factors based on some denominator in the gear?