An explansion board you insert into your computer so the computer can be connected to a network
Tripp Lite USA-19HS-C USB-C to Serial DB9 RS232 Adapter Cable - 3 ft. (0.91 m) Keyspan, High-Speed (M/M), TAA

Tripp Lite USA-19HS-C USB-C to Serial DB9 RS232 Adapter Cable - 3 ft. (0.91 m) Keyspan, High-Speed (M/M), TAA

Eaton
£30.99
C2G USB-C to Ethernet Network Adapter Converter

C2G USB-C® to Ethernet Network Adapter Converter

C2G
£35.99
C2G USB-C to Ethernet Multiport Adapter with Power Delivery - Black

C2G USB-C® to Ethernet Multiport Adapter with Power Delivery - Black

C2G
£59.99
C2G 3ft (0.9m) USB 2.0 USB-C to DB9 Serial RS232 Adapter Cable

C2G 3ft (0.9m) USB 2.0 USB-C to DB9 Serial RS232 Adapter Cable

C2G
£30.99
C2G USB Superbooster Extender interface cards/adapter

C2G USB Superbooster Extender interface cards/adapter

C2G
£59.99
C2G USB-C to VGA Travel Adapter

C2G USB-C to VGA Travel Adapter

C2G
£22.99
C2G USB/DVI interface cards/adapter DVI-I

C2G USB/DVI interface cards/adapter DVI-I

C2G
£69.99
C2G 0.45m USB to DB9 Serial Adapter Cable

C2G 0.45m USB to DB9 Serial Adapter Cable

C2G
£20.99
C2G USB 1284 DB25 Parallel Printer Adapter interface cards/adapter

C2G USB 1284 DB25 Parallel Printer Adapter interface cards/adapter

C2G
£25.99
C2G USB-C to Ethernet Network Adapter

C2G USB-C to Ethernet Network Adapter

C2G
£49.99
C2G USB 2.0 USB-C To DB9 Serial RS232 Adapter Cable

C2G USB 2.0 USB-C To DB9 Serial RS232 Adapter Cable

C2G
£40.99
C2G 86887 interface cards/adapter

C2G 86887 interface cards/adapter

C2G
£21.99