The PoE extender/switch does not require local power and is powered via the Uplink port PoE input.Additionally, it supports DC power input: DC 12V-57V, 5.5x2.1mm DC port,Supports PoE++ (802.3bt) power input, with a maximum of 90 watts input, and a total power output of 72 watts for LAN1-LAN4 PoE. Supports PoE+ (802.3at) output on LAN1-LAN4.LAN1-LAN4 Ext mode: Maximum network cable length up to 250 meters, Ethernet speed: 10 Mbps,LAN1-LAN4 LAN mode: Maximum network cable length up to 100 meters, Ethernet speed: 1000 Mbps,Automatically detects and protects PoE equipment from damage. Supports IEEE 802.3af/802.3at/802.3bt (maximum 90 watts) Power over Ethernet (PoE) switch,Supports DC 48V-57V passive Power over Ethernet PoE switch,Supports DC 48V-57V passive Power over Ethernet PoE injector, The PoE extender/switch has 5 10/100/1000 Mbps PoE ports, with the Uplink port for PoE input (compliant with IEEE 802.3bt/802.3at/802.3af) and LAN1-LAN4 ports for PoE output (compliant with IEEE