The Dare Power Pro Fence Energizer 300 Acre / 50 Mile (DC) is a high-performance dual-power energizer that runs on 110V AC or a 12V battery, delivering a strong 3-joule output with ultra-low impedance to power up to 300 acres or 50 miles of fence. Designed to shock through wet, heavy vegetation, it features full and half power settings, battery check and voltage indicators, effectively controls large animals and wildlife, and is backed by a user-friendly 2-year warranty that includes lightning damage.