What is it An adapter that helps you deliver both power supply and solid wired network connection to a single Micro-USB port. ^^ How does it work By converting PoE (Power over Ethernet) signal, or combining plain Ethernet and Micro-USB power supply, into Power&Ethernet over USB. ^^ What is PoE Deliver power and data with a single Ethernet cable for fewer wall plugs and messed cables. Extend powerline to where no AC outlets are nearby, up to 300 feet away from the power source. ^^ What else needed - You need an IEEE 802.3 af compliant PoE switch or injector for the PoE mode, or an extra Micro-USB power supply for plain Ethernet combining.
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Note: 1. For Raspberry Pi Zero, plug into the micro USB port marked USB instead of PWR. 2. Make sure the PoE input is connected to a functioning IEEE 802.3 af compliant PoE switch that has internet connectivity and power over Ethernet on PoE mode. 3. It can't be compatible with android phones and ipad. ^^ Non-Standard PoE Risk This splitter requires IEEE 802.3 af/at PoE. Non-standard (passive) PoE switches deliver power without negotiation, which can Overvolt and damage connected devices