sPOE Cameras and Power Repeater Switch

I have one of Zmodo/Funlux sPOE systems, and I would like to add two of my sPOE cameras to a remote location and use a wifi extender to join my network. I know some of the new sPOE systems are coming with an extra device called a Power Repeater. Is the power repeater rated 19V? Also are there similar devices on the market I could use?