RED SNAP'R ESP6V-RSS Steel 6V Solar Fence Charger Powers up to 15 miles or 30 acres, 100% Steel Case 0.2 joule output, 8.7 KV, Indicator light showing fence charger is working 2-yr warranty that includes damage caused by lightning 100% of Red Snap'r chargers must pass full load electronic testing after manufacturing Distance Rating for Steel Wire: 15 miles (no weeds), 7 miles (light weeds), 3.5 miles (heavy weeds), Distance Rating for Polywire: 7 miles (no weeds), 3.5 miles (light weeds), 1.75 miles (heavy weeds) Durable steel case to protect the charger from weather extremes, "Fence OK" indicator light to show fence activation