2-port RS-232/422/485 IEEE802.11g/b(D-sub) Metal housing with IP50 standard DIN-Rail mounting 15KV ESD protection for serial ports IEEE802.11g/b 2-port software selectable RS-232/422/485(D-Sub) wireless serial server with DC-jack lockable power connector V1.28(Kernel V1.16 & AP V1.31) V1.20(Kernel V1.14 & AP V1.26)