Ultrasonic prevention: sends a sound wave every 20-30 seconds. This device works with an interval vibration generator that sends vibrations and ultrasound between 400 Hz and 1,000 Hz. Solar Energy Saving: Solar panels provide enough energy by absorbing light, eliminating the need for additional batteries and charging. It is much cheaper than battery-powered insects. Br> Waterproof and durable: This solar insect repellent is waterproof, so you don’t have to worry about it not working on rainy days. Corrosion resistant and does not contaminate the floor even after long working hours. Br> Efficient and safe: No disruptive chemicals or pesticides, no traps, no dead animals. Does not cause any inconvenience to your cats, dogs and other pets. Br> Environmentally friendly: Ultrasonic mouse repellents can effectively kill hamsters, voles, snakes and other destructive rodents. The device releases vibrations in the ground, which disturb the animals and look for a more comfortable place.