Tenda TEF1105P 5-Port 10/100 Mbps Unmanaged Switch TEF1105P-4-63W is a 5-port 10/100Mbps unmanaged switch that requires no configuration and provides 4 PoE ports. It can automatically detect and supply power to all IEEE 802.3af/at-compliant Powered Devices (PDs). Enabling ""Ethernet Extend Mode"" makes Ports 1-4 negotiate to 10M full-duplex rate and isolate from each other, but all communicate with the Uplink port. In this mode, the transmission distance is up to 800 feets. In this situation, the electrical power is transmitted along with data in one single cable allowing you to expand your network to where there are no power lines or outlets, where you wish to connect devices such as APs, IP Cameras or IP Phones, etc.