24-Port PoE+ and 4 Combo Ports. IEEE 802.3af/802.3at compliant 10/100/1000Mbps Ethernet Ports.300W total PoE Power supply. Auto-sensing technology delivers up to 30W to an 802.3at PoE+ device with backwards compatibility for 802.3af PoE (15.4W) devices. 4 x 1G GbE/SFP Combo ports. Support for the 19-inch cabinet installation. Silent Design and Heat Dissipation. Plug and Play, Easy of use. Fanless design for silent operation. Made of high-quality metal case, sturdy and durable with long service life, provide better heat dissipation, suitable for most environment. Pin assignment, Mode A: 1/2(+), 3/6(-). High Quality PoE chipset inside. High Quality PoE chipset inside ensure High performance and stable operation of the product. Port-Power-Prioritization & Power Overload Protection. Port-Power-Prioritization technology ensure continuous power supply of key nodes. When total power consumption exceeds maximum PoE budget, the intelligent power management will cut the lower priority port power off to ensure the high priority port's power supply and protect the device from power overload operation. Electrostatic standard: contact 6KV, air 8KV. This item is in the category "Computers/Tablets & Networking\Enterprise Networking, Servers\Switches & Hubs\Network Switches". The seller is "i-xtech" and is located in this country: US. This item can be shipped worldwide.