Ultrasonic Pest Repeller, Quietly and Effectively Repels Pests - If you're considering a non-chemical method of repelling pests, we recommend an ultrasonic repellent, a device that emits a consistent noise at a frequency too high for humans to hear. These sound waves are designed to distract, annoy and deter common pests such as cockroaches, spiders, mosquitoes, ants and rodents. Intelligent multi-frequency ultrasonic conversion system makes pests have nowhere to hide. 360-degree protection of your home without dead ends. It is widely used in homes, warehouses, offices, restaurants, supermarkets, hospitals, granaries, etc. Depending on the severity of the infestation, it usually takes 1-2 weeks for results to be available. Results of electronic repellent can be seen within 3-4 weeks in most cases Then we can say goodbye to vermin and rats