This is our commercial PoE Switch.The following info is the features:1.Comply with IEEE802.3af/at standard 2. Power supply mode：1 2 + ,3 6 - 4 cores 3.The maximum output power of one sigle PoE port :30W 4. support VLAN function 5. Support watchdog function 6. support 250meters extended 7.high cost-effectibe power supply .8.short-circuit protection