Keep of my lawn. Deter pests with the Ultrasonic Solar-Powered Animal Repeller Get a pack of 1, 2 or 4 Device emits vibration waves to drive away pests Helps to keep away mice, rats, moles, snakes and more Made with ABS, PC and PP  Voltage: 1.2V; Power: 0.9W Solar powered design will charge up automatically Great for keeping pests away with harsh chemicals or harm   Buying Options: 9.99 pounds instead of 29.99 pounds for the 1-Pack - save 67% 16.99 pounds instead of 59.99 pounds for the 2-Pack - save 72% 29.99 pounds instead of 99.99 pounds for the 4-Pack - save 70%