[Multi-scenario and Large-scale Application]: This series of unmanaged switches are fast ethernet switches designed for high-forwarding network environments such as schools, families, SMEs and mini-monitoring. [4KV Lighting Protection]: It designed with lightning protection, it can withstand 4000 volts or more lightning, and prevent circuit failure. Built-in protection circuit. When a short circuit or overload occurs, the port will automatically fuse to protect the safe operation of the switch and other ports. [Metal Case and Fanless Design]: The metal body has excellent resistance to falling, and most accidental falls will not affect the functional use of the switch. The fanless design does not generate noise and also has good heat dissipation performance. The normal operating temperature range is - 10 to 55 ?, which is safe and worry-free. [VLAN Mode]: When the VLAN button is on, port 1 to port 24 are isolated from each other and communicate with port 25 and port 26 (uplink ports) only, which improve the network processing capacity and enhances the security of the LAN. [Plug & Play]: Simple set up with no software to install or configuration needed. Each port supports MDI/MDIX auto-flip and duplex/rate auto-negotiation. And with no configuration necessary making it perfect for home/small office and small-medium businesses. We will provide you with unconditional refund within 30 days to let you have better shopping experience. If you have any questions, please feel free to contact us. [28 Ports PoE Switch]: This ethernet switch includes 24 * 100Mbps ports, 2 Gigabit uplink ports and 2 SFP ports, support 1000Mbps POE and uplink connection, excellent data transmission performance. The SFP port suitable for longer distance transmission than ethernet.