Gigabit Switch 16 ports DS-3E1518P-SI, L2, Smart managed, 16 × gigabit PoE ports, and 2 × gigabit fiber optic ports, PoE power 225W, max 30W per port, Extend mode, transmission up to 300 meters in extended mode, PoE watchdog, PoE standard: IEEE 802.3af, IEEE 802.3at, L2 management protocols: STP/RSTP, VLAN, link aggregation, SNMP, QoS, metal material, dimensions: 440 mm × 220.8 mm × 44 mm, weight: 2.735 kg