【Ultrasonic Repeller】This ultrasonic repeller is the latest version of 2025. It uses ultrasonic theory and changes the frequency to stimulate the auditory system of mosquitoes and other harmful insects, making them unbearable and uncomfortable. 【Remarkable Effect】Ultrasonic pest control emits low-frequency sound waves, which continuously drive away pests, mice, mosquitoes, cockroaches, spiders, flies, fleas, ants, and rodents. 【Easy to install (4 pack)】Just plug this device into a power outlet vertically, the blue light will turn on and work automatically. Ultrasonic pest control usually takes 3-4 weeks for different results depending on the degree of infestation. 【Wide Effective Coverage】The electronic mosquito repellent is effective in indoor areas up to 1,200 square feet. It is also ideal for bedrooms, shopping malls, offices, garages, attics, basements, and warehouses. 【Safe and Harmless】Non-toxic, no chemicals or radiation, low power consumption, quiet, and 100% safe for people