ER-4 | Ethernet WAN Yes | 3xEthernet LAN (RJ-45) ports | DHCP client Yes | DHCP server Yes | Security algorithms IPSec/SSH/SNMP | Internal memory 1024 MB | Colour Black | Power consumption (typical) 13 W | AC input voltage 110 – 240 V | Operating temperature (T-T) -10 – 50 °C | Weight 795 g