Harmless and safe: By sending ultrasonic waves, pests such as mosquitoes, flies, spiders, ants, cockroaches, mice, etc. are kept away as they become disturbed and disoriented and leave the area. You avoid toxic substances and chemicals that are hazardous to health and having dead insects and rodents in your home. The use is completely harmless to humans and pets. Easy to use: To install the ultrasonic repeller, simply plug it into a standard electrical outlet. The insect repeller starts working immediately, no further installation is required. With 3 different frequencies indicated by different light colors. With practical night light function (the night light can be turned on and off as needed). Large coverage: The insect repeller can effectively cover an area of up to 80-120 m2 per unit. It is recommended to install 1 unit in each room. Please note that ultrasonic waves cannot pass through solid materials and walls, so make sure there is no furniture or other objects in front of them and keep doors and windows closed when using, so that the ultrasonic waves can work optimally. Effective mosquito repellent: The ultrasonic waves emitted by this insect and rodent repellent have a frequency that is far beyond the human hearing range. Enjoy a peaceful sleep, free from mosquitoes and worries about other insects and pests. The mosquito repellent is perfect for bedrooms and children's rooms. Specifications: Color: White Size: 12.5 x 12 x 6.5 mm Material: ABS Mounting: Wall socket Operating voltage: AC110-220V Output frequency: 9 kHz-36 kHz Product power: 4W Effective area: 80-120 square meters Recommended for indoor use only Package includes: 1 x Ultrasonic repeller against mosquitoes, flies, spiders, mice, etc. Harmless and safe Easy to use Large coverage Effective mosquito repellent