Full Gigabit ring network industrial managed PoE switch, with 4*Gigabit PoE ports + 2*Gigabit uplink SFP ports + 1*Console port, bandwidth 12Gbps, Layer 2 management, support ERPS protocol, ring network redundancy, IP40 protection, Surge 6KV, ESD 15KV, DC48-55V power input, redundant power supply, adapt to -40C~+85C wide temperature