Zareba B10M Battery Powered Solid State 10 Miles Fence Controller Battery powered solid state 10 miles fence controller For optimal performance use 6- or 12-volt deep-cycle battery not included Rugged, weather-resistant cabinets with digital timing Weed condition, Moderate and dry Battery life: 12-volt - 3 to 4 weeks; 6-volt - 4 to 5 weeks