Low-cost PoE injector to power PoE devices through Passive PoE. Simply connect the power supply to the injector and then connect the injector to the RouterBOARD device using an Ethernet cable. Helps reduce the number of wires leading to the device. For use with RouterBOARDS which support power of PoE of 10-28 V entrance tension has to be not less than 18 V to offset any losses in cables.