According to scientific research, animals are very sensitive to vibration, and even the tiniest vibration can be felt. Therefore, this product is based on the principle of transmitting vibration waves, making it unbearable for them thus wanting to escape from the scene. Customer feedback has shown that this product has been effective in helping deter a variety of animals in certain situations, including voles, moles, rats, mice, squirrels, martens, rabbits, foxes, gophers, armadillos, and even deer on occasion. While results may vary depending on environment and conditions, many users have reported noticeable improvements after proper placement and consistent use. This product is suitable for open places such as open grasslands and parks. The effective range is about 300 square meters. The closer the product is, the better the effect is. The built-in special device spreads sound waves and vibration waves through the land, making snakes or rats feel uncomfortable, so as to stay away from the scene and achieve the purpose of driving away. Solar panels are used to extract electric energy, and high quality and environment-friendly rechargeable batteries are built-in at the same time, which can store sufficient electric energy. This product is easy to install and has no radiation or damage to human body thus making it safe to use. We stand by the quality of our products and are confident that you will be satisfied with your purchase. If, for any reason, you received a defective item, we offer a 30-day money-back guarantee. Don't hesitate to contact us by sending us an e-mail to support@gardensdepot.com and we will be glad to assist you.