Safe and Environmentally Friendly:The ultrasonic mouse repeller is made of high quality environmentally friendly ABS. No annoying chemicals or pesticides, no traps, no dead animals. Ultrasonic prevention:Sends a sound wave every 20-30 seconds, this device works thanks to a generator of interval vibration which sends 400Hz- 1,000Hz vibration and ultrasonic. Solar Power Saving:Built-in high-tech solar panels, the repeller can automatically charge from solar panels. Solar panels provide ample power by absorbing light, eliminating the need for extra batteries and charging. It is much cheaper than battery-powered insects. Effective and Safety:This disturbance will cause the pests to force them to evacuate the area, as they see it as a danger, and then drive them away. Sound waves do not harm pets or children. Waterproof:Made of high quality and eco-friendly materials, it has good water resistance and does not not afraid of the rain. Noticed: Never immerse this product in the rain. If it rains heavily, it is recommended to put the product indoors before it rains, so as not to affect the service life. Once the rain has fallen, enter the garden again.