The zoom 3037 pci express modem is an internal fax modem that can connect to a windows pc through a pci express slot the zoom 3037 is a single lane x1 pci express card for a standard format computer and will fit into any available low profile bracket pci express slot regardless of the lane sizethe zoom 3037 pci express modem has a low profile bracket for easy installation in a low profile desktop computer and has complete regulatory compliancen