ER8411 , Ethernet WAN Yes , SFP WAN Yes , Port forwarding Yes , 8xEthernet LAN (RJ-45) ports , 2xCombo SFP ports quantity , DHCP client Yes , DHCP server Yes , Internal memory 4096 MB , Colour Black , AC input voltage 100 - 240 V , Operating temperature (T-T) 0 - 40 °C