The HUB ModPanel is what connects everything together.
The ModPanel Mini allows you to attach up to THREE modular items (mods) to this low-profile rail.
The ModPanel Max allows you to attach up to SIX modular items (mods) to this low-profile rail.
The ModPanel is the base of the whole HUB Ecosystem. This is where you can attach all existing HUB Mods (Keychain, Cardholder, Sanitizer Holder & USB Lanyard)