Smart technology: This ultrasonic mouse repeller emits different frequencies of ultrasonic waves (25kHz-65kHz) to irritate the nervous system of insects and rats, making them feel uncomfortable and gradually flee. Intermittent changes in ultrasound frequency prevent them from developing immunity and adaptability. Great coverage: Each ultrasonic repeller can cover up to 80 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 repellent. 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 mousetraps, mosquitoes, mousepads, poison pest control, and insect sprays etc, No battery needed will save you lots of money, give you a 100% safe and eco-friendly home. Super quiet and effective mosquito repellent: The ultrasonic repeller works with low frequency ultrasonic waves, so it allows you to control pests completely silently and cannot disturb you and your pets. Please note that it requires a process. Depending on the environment, the response time varies, usually 2-6 weeks, we are sincerely here to help you keep the pests away. Easy to use: just plug the repeller into the outlet and let it work. The repellent instantly repels pests without killing them. No batteries are needed, saving you a lot of replacement.