Exactly what it says in the first line: motherboard power control without a case. Their main product appears to be an open-air ATX "case", which basically amo

Exactly what it says in the first line: motherboard power control without a case. Their main product appears to be an open-air ATX "case", which basically amounts to a motherboard mount, a fan mount, a rail to support PCI cards, and a mount point or two for hard drives, without side walls and without a power button. So they also sell a power button mounted onto a PCI bracket, to slot into an open slot on the case's PCI rail.