Ultrasonic Pest Repeller NGPC-6004L, and Electromagnetic NGPC-6006L. The first one is the NGPC-6002L ultrasonic Pest Repeller, designed to keep unwanted pests, like mice, rats, cockroaches, and mosquitoes. The device is not only suitable for the home but also effective for business areas. Ultrasonic pest repellers are one of the most popular options. https://naturegold.in/pest-repeller/