Yes you can control two sets of pucks with the same remote. You have to make sure connection boxes are close to each, the remote has to be able to see each of the wires attached to each connection box.
This RGB Color Changing puck light kit is not designed to be direct wired or spliced into an older existing system. Its a normal plug in type with remote control. If you have any other questions please call Home Depot 1-877-527-0313.
Hello power cords are available for the RGB puck light kit, please call Home Depot Customer Service number @ 1-877-527-0313 for additional help.