The PerchPopper is engineered to use power efficiently and the two AA batteries typically last over a year(more info on battery life).  Because of the long lasting battery life, the convenience of having no wires to fuss with, and the portability benefit of having no wires for those that move their coops, we only offer a battery-powered PerchPopper.  We simply don't see any real benefit of having a plug-in version.