Safe for both humans and pets. Insect repellents do not contain harmful chemicals or toxins, and are safe and harmless to humans, children, and pets. This indoor supplement emits invisible electromagnetic waves, expelling insects and mice, making them feel uncomfortable and gradually escaping. Night light function: This insect repellent emits a soft glow in the dark, and you can adjust the LED brightness using the light switch. The smart night light of this insect repellent creates a stable and comfortable environment for you. Easy to use, just plug the insect repellent into the socket without any tools. A type of ultrasonic insect repellent is effective in 15-30 areas, with 4 pieces in the package. It is recommended to install this insect repellent vertically at a distance of 20-80cm from the ground. Please note that the expiration date of our ultrasonic insect repellent is 3 to 4 weeks, depending on the severity of the infection. Then we can say goodbye to pests and mice. The upgraded ultrasonic mosquito repellent, which is quiet and has lower power consumption, uses low-frequency ultrasound, which means it can provide you with extremely quiet pest control without disturbing you and your pets. Widely used in homes, warehouses, offices, gardens, hotels, factories, hospitals, shops, etc. Effective against all pests: spiders, mice, insects, cockroaches, mosquitoes, mice, fleas, flies, ants, mice, cockroaches, bed bugs, rodents. We suggest installing an insect repellent for each room, as ultrasound cannot penetrate walls and solid objects.