TP-Link TL-SF1005P 5-Port 10/100Mbps Desktop Switch with 4-Port PoE TL-SF1005P is a 5 10/100Mbps ports unmanaged switch that requires no configuration and provides 4 PoE (Power over Ethernet) ports. It can automatically detect and supply power with all IEEE 802.3af compliant Powered Devices (PDs). 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 fix devices such as APs, IP Cameras or IP Phones, etc.  Highlights: Power over Ethernet, 4 of the 5 Auto-Negotiation RJ45 ports (Port 1 to Port 4) of the switch support Power over Ethernet (PoE) function. These PoE ports can automatically detect and supply power with those IEEE 802.3af compliant Powered Devices (PDs). Overload Arrangement, TL-SF1005P has the priority function which will help protect the system when the system power is overloaded. If all PoE PDs power consumption is >= 58W, a priority will be arranged among the PoE ports, then the system will cut off the power of the lowest-priority port. Port Priority Function, Priority (port-1=port-2=port-3>port-4): This function will help to ensure the normal operation of the system, it means Port 4 will be cut off when all total PoE PDs power consumption exceeds 58W. For an example, Port 1, 2 and 4 are using 15.4W (maximum power for per port is 15.4W); the system power is 46.2W in total. If there is an additional PD inserted to Port 3 with 12W, and then the system will cut off the power of Port 4 because of the overloaded power, this means Port 1, 2 will use 15.4W, and Port3 will use 12W, no power will be supplied to Port 4. Warranty 5-years HARDWARE FEATURES Interface 5 10/100Mbps RJ45 PortsAUTO Negotiation/AUTO MDI/MDIX Network Media 10BASE-T: UTP category 3, 4, 5 cable (maximum 100m)EIA/TIA-568 100Ω STP (maximum 100m)100BASE-TX: UTP category 5, 5e cable (maximum 100m)EIA/TIA-568 100Ω STP (maximum 100m) Fan Quantity Fanless External Power Supply External Power Adapter(Output: 48VDC / 1.25A) PoE Ports (RJ45) Standard: 802.3 af compliantPoE Ports: Port1- Port4Power Supply: 58W Mac Address Table 2K Switching Capacity 1Gbps Dimensions ( W x D x H ) 3.9 x 3.9 x 1.0 in. (99.8 x 98 x 25 mm) Transmission Distance Store-And-Forward Max Power Consumption 1.678W (max. no PD connected)64.82W (max. with 58w PD connected) Max Heat Dissipation 5.73BTU/h(no PD connected)221.17BTU/h(with 58W PD connected) SOFTWARE FEATURES Transmission Method Store-And-Forward Advanced Functions Compatible With IEEE 802.3af Compliant PDsPriority FunctionMac Address Auto-Learning And Auto-AgingIEEE802.3x Flow Control For Full-Duplex Mode And Backpressure For Half-Duplex Mode OTHERS Certification FCC, CE, RoHS Package Contents TL-SF1005P, Power Adapter, User Guide Environment Operating Temperature: 0℃~40℃ (32℉~104℉)Storage Temperature: -40℃~70℃ (-40℉~158℉)Operating Humidity: 10%~90%RH non-condensingStorage Humidity: 5%~90%RH non-condensing