The Solar Pest Repeller works around the clock to prevent snakes, mice, rats and other rodents from invading your lawn, garden, campsite and more. It works by emitting both sound and vibration pulses which are piercing and painful for pests, keeping them away. Pests such as snakes and rodents can be highly dangerous to the whole family. With the Solar Pest Repeller, they will recognise a danger zone, and will evacuate the area. For best results it is recommended to use two units approximately 18 cm apart in the highest risk area. The repeller's are attached to sturdy spikes which can easily be staked into the earth.