About this item A PoE-powered PoE-sourcing ethernet switch. Used for network equipment with PoE signal function, as relay equipment to achieve signal extension. Total output power 25.5w, Maximum output each channel of 4 ports 15.4W. Not able to provide all 4 port at 15.4W in the same time. Total output power of 4 ports should be less than 25.5w. Applicable Range: A Used with AP, IP camera, IP telephone and the other network equipments in the situation of the lack of power line or far away from the power outlets. A Instal at hotels, schools, buildings,etc.When using and installing, please strictly follow the product power and related electrical parameters, and follow the product instructions. Network Medium: Cat5 or better UTP cables(less than 120m) ;PoE input-1 RJ45 port, PoE output: 4 RJ45 port; PoE Standard: IEEE 802.3at (power-in),IEEE 802.3af(power-out);PoE Port Power: input power-25.5Watts,output power-24Watts;PoE Power Supply Type:1/2(+),3/6(-),Mode A,End-Span; NOTE: 1. Using high quality transmission cable can transmit up to 100~120m. With poor cable, transmission may not able to reach 80meters. 2.If the power consumption in front end device is too large, its working voltage may not be enough. 3.Cascading series too much will cause low voltage, may not working. 4.Strictly refer to poe extender Manual Guide to install the equipment,that will perfectly meet with your project requirement .