10-Port Industrial USB 2.0 Hub Rugged USB Hub w/ESD Level 4 Protection DIN/Wall/Desk-Mountable USB-A HUB USB Port Expander w/Lockable Ports Multiport USB Hub

8 Port USB-to-Serial Adapter Hub – USB to RS232 Serial Port Adapter with Daisy Chain – Rackmount – RS232 Multiplexer – Serial Converter with FTDI chipset and COM Port Retention