Ultrasonic mosquito repellent, indoor electronic mosquito repellent, can repel mosquitoes, rats, spiders, cockroaches, flies and other pests, pack of 4

【Ultrasonic Mosquito Repellent】 - This is our advanced version. Using the principle of ultrasound, the frequency is modified to stimulate the auditory system of mosquitoes and other pests, giving them an unbearable and uncomfortable sensation.【Wide Coverage】 - Each ultrasonic electronic mosquito repellent can effectively cover an area of up to 80-120 square meters. However, ultrasound cannot penetrate walls. We recommend using at least one mosquito repellent per room. This ultrasonic mosquito repellent is perfect for homes, offices, garages, attics, basements, warehouses, and greenhouses.【Easy to Use】 - Simply plug the ultrasonic mosquito repellent into an outlet. Make sure to install it vertically, 30 to 120 cm from the ground. [Environmentally friendly and safe] - Ultrasonic waves only affect pests and rodents, completely harmless to humans and pets. No radiation, no chemicals, no odor, no noise. [Effective working time] - Ultrasonic pest control typically takes 3 to 4 weeks to achieve varying results, depending on the severity of the pest infestation.