Check the listing for details. US Robotics USR5638 Fax Modem 56 Kbps V.92 PCI-Express LOW PROFILE BRACKET. Condition: Used. Listed at 5.00 USD. Introducing the US Robotics USR5638 Fax Modem, a high-speed 56 Kbps V.92 PCI-Express modem with a low profile bracket. This modem is compatible with a universal brand and product line, and has external interfaces for DSL/Phone (RJ-11) with one port. The item length, height, and width are all low profile, making it easy to fit into any computer setup. The US Robotics USR5638 Fax Modem has a custom bundle option, with standards for V.92 speed and a maximum data rate of 56 KBps. It also comes with an internal interface for PCI E, and is manufactured in China. Please note that California Prop 65 Warning states that this item is not edible. Don't miss out on the opportunity to add this high-speed modem to your computer setup!