With ultrasound tones animals and insects can be scared away: eg rats, mice, martens, wild rabbits, mosquitoes. Mounted on the car, deer take flight (reduced risk of accidents). For connecting a piezo tweeter speaker. The module is ideal for scavenging pests from storerooms, kitchens, warehouses, gardens, etc. Can also be used as a dog whistle. Some bird species can be removed from your fruit trees.