One used StarTech ICUSB234854I industrial serial hub per purchase. Manufacturer specifications: USB 2.0 host connection and four DB9 serial ports supporting RS-232, RS-422 and 2-wire/4-wire RS-485. IP30-rated metal housing. These are serial ports, not Ethernet LAN ports.
Refer to the photographs for the actual unit and included accessories. Only the accessories shown in the listing photographs are included; please check the photographs before purchasing.