MARK7 is a low-impedance Fencer for indoor installation and will charge up to 30 miles of single or multi-wire high tensile fence. Fencer features patented control board for better protection against poor grounding and lightning damage. Built-in performance meter, output transformer. Fencer will shock through wet weeds and brush and is ideal for livestock or predator control. MARK6-2 Parmak Fencer in 220V.