Quick overview from the supplier:
28-port Gigabit EasySmart PoE+ Switch TP-LINK "TL-SG1428PE", 24xPoE+ ports, 2xSFP Slots, 250W Budget
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24 10/100/1000Mbps RJ45 PoE+ Ports Switch with 2 SFP Slots
PoE power budget is up to 250 W*, making it ideal for small to medium business surveillance systems
Priority Mode helps to guarantee the quality of sensitive application like video monitoring
PoE Auto Recovery enables system self-healing to guarantee the stable operation of PoE-connected devices
QoS is for smooth internet-surfing experience and IGMP Snooping is capable of optimizing traffic for IPTV
Intelligent power management can protect the switch from overload
