The P20 Dual-Purpose Fence Energizer allows you the flexibility to run the energizer on a 110-volt plug or with a 12-volt deep-cycle battery. This energizer can also be set up with a solar panel. It is suitable for cattle, horses, deer, pigs, sheep, goats, and other small pets or nuisance animals. With 2.0 output joules, it powers up to 50 miles or 165 acres of fence. This low-impedance energizer has a highly visible, flashing red light that indicates the energizer is working and powering the fence. Works with steel wire, aluminum wire, and poli-products. The P20 allows for easy mounting onto the fence wire with a unique, clip-on wire feature.