Parmak HS-100 110-20-Volt Horse Surround Low Impedance Electric Fence Charger 110-20-volt horse surround low impedance electric fence charger Use to control and train horses, shocks through wet weeds and brush, built in dual flashing operational red/green light Quick, easy installation and charges up to 5 miles of fence Horse surround, 110-volt, low cost, low impedance, UL listed fence charger 2 year warranty