?�Powerful Performance�: This latest ultrasonic rodent repeller has two chips, which will emit stronger and more concentrated ultrasonic waves, which will make it harder for pests and rodents to approach than before. Bed bugs, spiders, ants, cockroaches and mice stay away from you Homes! ?�Safety and environmental protection�: The insect repellent contains no chemicals, no radiation, no odor, no dead insects, no batteries and gives you 100% safety guarantee. Its ultrasound only affects parasites, and ears can’t detect sounds, so it won’t interfere or irritate humans and animals! ?�Small and lightweight, wide sound range ‘apps�: The new small square design is very cute, cartoon style, only 35g each, ultra-light and stress-free, widely used in homes, warehouses, offices, hotels, etc! ?�Weight rate �Effective Coverage�: Ultrasonic insect repellent is effective indoors under 1600 square feet. We recommend installing one unit per room for best and best results. For larger storage