Sunforce 80004 Solar Pest Repeller, (Pack of 2) Solar pest repeller keeps voles, gophers, or other rodents from invading your lawn or garden Repels over a 6000 square foot range by emitting an intermittent combination of sound and vibration Made of durable ABS plastic and corrosion-proof aluminum Completely weatherproof, the repellers wors day and night and run on long-life Ni-Cad solar charged rechargeable batteries (included) Pet and child friendly