The MDX Concepts Radar Pest Repellent Device is an eco-friendly plug-in ultrasonic pest repeller designed for indoor use. With its easy-to-use features and white color, this 4-pack device from MDX Concepts is perfect for controlling all types of pests in your home or garden. Powered by electricity and originating from China, this model provides a safe and effective solution for keeping pests away without harming them.