New in 2022 and Effective: With the latest double chip, this pest repeller emits different frequencies of ultrasonic waves to irritate the nervous system of insects and rats, making them feel uncomfortable and gradually run away. Can effectively repel cockroaches, mice, mosquitoes, ants, spiders and other pests. Wide Effective Coverage Area: Each Electronic Ultrasonic Pest Repeller is effective for a large area up to 800-1300ft². But ultrasound does not penetrate walls. We recommend using at least 1 device per room. Pest control is widely used in homes, warehouses, offices, gardens, hotels and basements. Easy to Install and Use: Just plug the Ultrasonic Mosquito Repellent into the power outlet. Make sure to install it vertically 80-120cm off the ground. Ultrasonic pest control emits sound waves with low frequency, which permanently repels pests, mice, mosquitoes, cockroaches, spiders, flies, fleas, ants and rodents. SAFE FOR CHILDREN AND PETS: Mosquito repellent is safe, odorless,