OdiySurveil(TM) 4-Port 10/100M IEEE802.3at (Power-in) to IEEE802.3af (Power-Out) PoE Extender for Ethernet/PoE Power USE PROPERLY: The PoE Extender can only be used for CCTV IP network camera PoE data extension and amplification (CAN NOT TRANSMIT HOME NETWORK OR OTHER NETWORK CAMERA SIGNAL). BEFORE YOU INSTALL IT,PLEASE CAREFULLY READ ITS INSTRUCTION IN THE PACKAGE. USING IN WRONG APPLICATION ENVIRONMENT MAY CAUSE NO WORK. PoE input-1 RJ45 port, PoE output: 4 RJ45 port; If you only need 1-Port Input 1-Port Output POE Extender, you may refer to ASIN: B018TH31TC. Network Medium: Cat5 or better UTP cables(less than 120m),refer to the 6th product image for using; 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 which can transmit up to 100~120m,if using poor cable that will not reach to 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, the voltage will be low, it also may not work. 4.Need to match with Poe switches as the last image.Strictly refer to poe extender Manual Guide to install the equipment,that will perfectly meet with your project requirement .