StarTech.com 4 Port PCI RS232 Serial Adapter Card with 16550 UART - 4 x 9-pin DB-9 Male RS-232 Serial PCI
StarTech.com 4 Port PCI SuperSpeed USB 3.0 Adapter Card with SATA/SP4 Power - 4 Total USB Port(s)
Add 4 SuperSpeed USB 3.0 ports to a computer through a PCI slot. The PCIUSB3S4 4-Port PCI to USB 3.0 Card enables legacy PCI slots to support the SuperSpeed USB 3.0 standard, which is capable of data transfer rates up to 5 Gbps. Using USB 3.0 devices...
StarTech.com 4 Port Portable SuperSpeed USB 3.0 Hub
StarTech.com 4 Port Portable USB 3.0 Hub with Built-in Cable - Aluminum and Compact USB Hub - 4 Total USB Port(s) - 4 USB 3.0 Port(s)
Control up to 4 PC or Mac computers from a single keyboard, mouse and monitor and share any USB device between all connected computers. The SV431USB 4 Port rack mountable VGA USB KVM Switch with Hub offers simple control of up to four computers from a...
This Rack Mountable USB KVM Switch supports high resolution video applications (up to 1920x1440 pixels supported) and audio switching between connected computers, and provides an integrated USB 2.0 hub that lets the selected computer have access shared...
StarTech.com 4 Port RS232 Mini PCI Express Serial Card w/ 16650 UART - Mini PCI Express
StarTech.com 4 Port RS232 PCI Express Serial Card w/ Breakout Cable - PCI Express x1
StarTech.com 4-Port Self-Powered USB-C Hub with Individual On/Off Switches, USB 3.0 5Gbps Expansion Hub w/Power Supply, Desktop/Laptop USB-C to USB-A Hub, 4x BC 1.2 (1.5A), USB Type C Hub - USB-C/A Host Cables (5G4AIBS-USB-HUB-EU) - hub - 4 ports