SMART CHIP UPDATE TO: Our ultrasonic repellent uses its two smart chips to disperse mice, rats, cockroaches, and other insects. Its alternating ultrasonic waves disturb the pests to the point where they are forced to leave and find refuge elsewhere. ABILITY TO COVER LARGE AREAS: Each ultrasonic electronic repeller is effective for a large area up to 800-1300ft². Please note that ultrasonic waves cannot pass through walls. Although our pest repellent works well, if you have a large infestation, we recommend placing our insect repellent in every room. HARMLESS TO ANIMALS, CHILDREN, ECONOMY AND ECOLOGY: Protect your home against pests without using dangerous chemicals, sprays or deadly traps. High ultrasonic frequencies cannot be heard by humans or your pets. Ultrasound will chase away pests without killing them. EASY TO USE: This machine should be installed 80-120 centimeters from the floor. And vertical to the floor and plug into the power outlet. It can be plugged directly into the
