?Widely Used?Metal case, fanless silent, double side vents; with hanging ears, support desktop/wall/rackmount install. Stable POE and switching chips, can be used in various networks of home,office and business, including computer internet, security monitoring, wireless coverage, transmission access of multiple devices, etc. ?Unmanaged Plug and Play?Supports automatic detection of power supply for POE devices, built-in power module, just connect the power cord, and connect to the device through the network cable, no other configuration is required, the LED indicator on the panel shows the status, the use and maintenance are very simple. ?Vlan Isolation & Extend Distance?Ports 1-16 support VLAN port isolation and cannot communicate with each other, only communicate with uplink port 17-18 port, which can reduce network congestion, improve performance and safety; ports 1-16 support POE distances up to 250 meters, the rate is 10Mbps. ?IEEE 802.3af/at?PoE Ports 1-16 support ieee802.3af/at POE, max 30W; The whole machine output power is 200W. Output POE voltage 44~57V, typical value 48V. *Please note: it will not supply power to passive 24V PoE and NON-PoE devices.*. ?18 Ports?Includes 16 ports 10/100Mbps POE and 2 Gigabit Uplink(100/1000Mbps); supports port automatically adaptive. The 2 gigabit uplink support higher rate than 100M port, improve 1-16 port bandwidth utilization.