Connect up to 4 RS232 serial devices to your computer through a single USB port with this adapter hub that features a bus-powered design to eliminate the need for an external power adapter.

StarTech - 4-port USB-to-RS232 Serial DB9 Adapter Hub - Silver

$63.99

Connect up to 4 RS232 serial devices to your computer through a single USB port with this adapter hub that features a bus-powered design to eliminate the need for an external power adapter.