The POE switch uses a unique DIP switch design to provide one-key isolation (VLAN) mode, so that ports 1~8 is in a network isolation state, which can effectively prevent the occurrence of DHCP spoofing and suppress broadcast storms; and it also supports one-key switching of 250-meter long-distance transmission modes. In this mode, ports 1 to 8 will be forced to use a transmission rate of 10Mbps to provide a maximum transmission and power supply distance of 250 meters. For more: www.szwlink.com