StarTech.com NETRS232-4, Serial, 4 x DB9 & 1 x RJ45, Beige, DC, 9 V, 0 - 70 °C StarTech.com NETRS232-4. Host interface: Serial, Connector(s): 4 x DB9 & 1 x RJ45. Product colour: Beige. Power supply type: DC, Output voltage: 9 V. Weight: 800 g. Compatible operating systems: Windows 2000, XP, Vista Linux, Compliance industry standards: TCP/IP, HTTP, ICMP, TFTP, UDP