StarTech.com Portable 4 Port SuperSpeed Mini USB 3.0 Hub - Black

USB - External - 4 USB Port(s) - 4 USB 3.0 Port(s) - PC, Mac

Adesso 7-ports USB 2.0 Hub with 5V2A Power Adaptor

USB - External - 7 USB Port(s) - 7 USB 2.0 Port(s) - PC, Mac

Brainboxes 2 Port RS422/485 Ethernet to Serial Adapter

DIN Rail Mountable - TAA Compliant

Brainboxes 8 Port RS232 USB to Serial Adapter

USB 2.0 - DIN Rail Mountable, Wall-mountable - TAA Compliant

Brainboxes 4 Port RS232 USB to Serial Server

USB 2.0 - DIN Rail Mountable, Wall-mountable - TAA Compliant

Black Box IC1023A 8-port RS-232 Adapter

USB

Brainboxes ES-413 Multiport Serial Adapter

DIN Rail Mountable - TAA Compliant

Aten 4 x 4 USB 3.1 Gen 1 Industrial Hub Switch

USB Type B - 4 USB Port(s) - 4 USB 3.1 Port(s) - Mac, PC, Linux

StarTech.com USB C Hub - 4 Port USB C to USB-A (4x) - Bus Powered USB Hub - USB Type C to USB Hub - USB-C to USB - USB 3.1 Type C

USB Type C - External - 4 USB Port(s) - 4 USB 3.0 Port(s) - Mac

Brainboxes 4 Port RS-232 Universal low-profile Multiport Serial Adapter

Universal PCI - 4 x DB-9 RS-232 Serial Via Cable - Half-length Plug-in Card