DS-3E0105P-E/M(B) 4-Port 100 Mbps Long-Range Unmanaged PoE Switch Intelligent PoE Management. • When the power supply exceeds the limit, PoE ports intelligently manage the power supply, which extends the switch lifetime. Up to 300 m Long Range PoE Transmission. • The distance between IPCs and switch can reach maximum 300 meters. 4/8-Core Adaptive Power Supply with Less Power Loss. • 8-core power supply reduces the power loss on cables. 6KV Surge Protection to Improve Reliability in Harsh Environment. • The built-in surge protection device protects the switch from the sudden lightning surge in harsh environment. Design for Video Transmission. • VIP port ensures important data transmission when network congestion occurs. DS-3E0105P-E/M(B) is a layer 2 100 Mbps PoE switch. Based on wire-speed forwarding, the switch supports PoE power supply