20+4 port Gigabit Ethernet Layer3 switch with 24x 10/100/1000 Mbps RJ45 ports, including 4x 10/100/1000 Mbps combo ports RJ45/(Dual Speed) SFP to accommodate a standard Mini-GBIC, SFP DDM support, Layer 3 Unicast/Multicast Routing for IPv4/IPv6, 802.1Q VLAN, QoS, IGMP Snooping, 802.3ad Trunking, Management via SNMP, Console, Telnet and Web, Alarm Relay, extended temperature range -30°C to +60°C, power supply 100 - 240V AC, including 19' mounting kit