Intelligent Technology: This ultrasonic mouse repellent emits different frequencies of ultrasonic waves (25 kHz to 65 kHz) to irritate the nervous system of insects and rats, making them uncomfortable and gradually flee. Intermittent changes in the ultrasonic frequency prevent them from developing immunity and adaptability. Large Coverage: Each ultrasonic repellent can cover up to 120 square meters. It is recommended to install this hammer vertically at a distance of 20 to 80 cm from the ground. For best results, equip each room with a pest repeller. Safe and Eco-Friendly Mosquito Repellent Control: Non-toxic, no chemicals, no radiation, less power consumption, no noise and 100% safe for humans and pets, you will say goodbye to mouse traps, mosquitoes, mouse pads, pest poison, and insect sprays, etc. No battery required will save you a lot of money, give you a 100% safe and eco-friendly home. Super Quiet and Effective Mosquito Repellent: The ultrasonic repellent works with