ZKAccess 12V DC POE SPL POE, Injector and Splitter Power over Ethernet (12V DC, 2A Output)
Amazon.com: PoE Texas 12 Volt PoE+ - IEEE 802.3at - Splitter Splits Power Over Ethernet to 12v DC & Gigabit Data with Opto-Isolation Protection for 12v 25w Devices, Tablets, Single Board Computers,
Amazon.com: LINOVISION DC12V POE Injector with DC 12 Volt to POE 24V/48V Voltage Booster, POE for Solar/Vehicle, or act as UPS POE Switch Supports AC110V Input and Backup Battery, Stopless POE Power
8 Port PoE Switch For Mobile Installations - 12v DC Powered Power over Ethernet - YouTube