Reliable 10 Mile Solar Fence Energizer Operates up to 2 weeks Without Sunlight Can be used to control most livestock, short haired or small animals At glance indicator light flashes when energy is on the fence Powers up to 10 miles of fence, Type:0.15 joule output Reliable solar power, operates up to two weeks without sunlight Fast installation on T - posts, round wood posts, Y - posts, buildings and flat surfaces with unique, integrated mount