Zareba ESP30M-Z 30-Mile Solar-Powered Low-Impedance Electric Fence Charger Solar-powered fence charger for an electric-fencing system 30-mile range; can run day and night for up to 2 weeks with no sun Fence OK indicator light; color-coordinated terminals; 2 6-volt batteries Uses low-impedance technology to maintain maximum energy levels on the fence Measures approximately 17-1/2 by 12-1/5 by 10-2/3 inches; 2-year warranty