Please read through the guide in Shenzhen 2 U before making any purchase in this catalogue.PoE (Power over Ethernet) is a technology that allows electrical power to safely pass along the same Ethernet cable with data. Using one cable, you can hookup Ethernet and power in one simple step.This product comes in a pair. Each has a female RJ45 on one side, and on the other side is a male RJ45 and a splitter jack or an injector plug.FeaturesBased on the current Category 5 cable standard published by IEEE, it uses 4&5(+) and 7&8(-) as power pins, while 1&2 and 3&6 are data pins.Size of the splitter jack and the injector pug: 5.5mm x 2.1mmLength: 19cmNetwork type: 10BASE-T, 100BASE-TOperating temperature: -40°C - 60°COperating voltage: 3 – 57vApplication IdeasEthernet based monitoring systemsEthernet based IoT networks