The HUB ecosystem is ingenious.
An ultra-robust clip that won’t go anywhere once clipped onto you (be it a pocket, belt, or the strap of your messenger bag, tote, or backpack) hosts the various elements that make up this ecosystem: here it's a key holder, but you can also attach a small pouch or card holder to the D-ring. It locks automatically, guided by powerful magnets, and once you arrive home or at the office, you leave the clip in place but remove only what you're carrying by pulling on the tab to store it on the HUB Mod Panel. Is that well explained? Perhaps not, as many things so simple and brilliant may seem complicated... In short: watch this video ;)