5 ports 10/100/1000Base-T RJ45, 1 or 4 ports - Buffer up to 4 Mbit, supports 4k transmission - Supports web-based network management, supports VLAN, QoS, RSTP, SNMP network function, etc - Industrial level protection 4 (ESD,RS,EFT,CS);-40C +80C operating temperature - Alarm input and output port - Concurrently, 24 V (passive PoE) and 48 V PoE IEEE802.3af (15,4 W),IEEE802.3at (30W), IEEE802.3bt (60W)