Improved Design: This ultrasonic bug catcher uses the most advanced ultrasonic technology that can produce powerful ultrasound accompanied by an alarm sound and a flash. The built-in motion detection sensor is highly sensitive and can be triggered at an angle of 110 degrees and a distance of 20 to 25 meters for maximum performance Solar Drive: The tracker is equipped with solar panels on the top. It can be charged via a solar or USB charging cable under the sun. Ideal for all kinds of weather Humane Design: Solar powered animal repellents simply drive animals away without any chemicals. It only emits 13.5 kHz to 45.5 kHz ultrasound to drive them away. Will not cause any harm to the human body. Will not harm your own cat, dog or other pet Easy Installation: Our repellents are easy to install and offer many mounting options. Whether on a wall or fence, or simply plugged into the ground, this ultrasonic repellent stops small rodents, squirrels, cats, dogs, etc. The Perfect Choice: Tired