PoE Passive Adaptor Kit (RJ45) PoE (Power Over Ethernet) is a technology that allows transfer of electrical power, along with data, over twisted pair cables. Finding a power supply is a common obstacle in LAN installations: PoE allows you to power wireless access points or other equipment via a Cat 5 cable without the need to have a separate power source available. You simply connect a power supply of the required voltage via the 2.1mm DC connector, then tap it where you need it at the other end. 1. Due to different monitors and lighting effects, the actual color may be slightly different from the image 2. Due to manual measurement, please allow 1-3cm deviation Power output interface DC male 5.5mm*2.1mm Output interface RJ45 crystal head Voltage: DV12V Size: length 25cm Shipping color: white Quantity shipped: 1