Good Helper for Invisible Expulsion - The nervous system of the rat is stimulated by the cyclic vibration wave of the buzzer, so as to drive away the mouse. The product can also drive away moles, snakes and rodents. The product does not emit radiation when in operation, uses ultrasonic waves to repel moles, etc. Solar charging - The product absorbs sunlight during the day and converts it into electrical energy and stores it in the battery. At night, when the switch is turned on, it automatically emits ultrasonic waves, without manual operation or external power supply, which is more convenient and energy saving. Durable and long service life - The use of high quality ABS material, which is waterproof and durable on the outside, not only increases the service life of the product, but also provides more stability when fixing. Even working for a long time will not overload the soil, the green shell can easily hide in the plants. Safe, reliable and environmentally friendly - The product design is more humane and harmless to the human body .It provides a safer and more effective way to repel rodents, instead of using chemicals or harmful substances to repel rodents. Wide effective coverage - It can be used in gardens , courtyards or outdoor camping, and it can also repel animals hiding in dead ends. The effective working range is about 650 square meters. It is recommended to install one at an installation interval of five to eight meters to achieve greater coverage.