General description Safe and eco-friendly, this 4PCS Ultrasonic Pest Repellent is designed to repel rodents and insects without the use of poisons, traps, or chemicals. The ultrasonic sound emitted is inaudible to humans and pets, making it safe for use around children and pregnant women. This lightweight and portable device is easy to install—simply plug it into a power outlet, ensuring there are no barriers like curtains or cabinets obstructing the sound. The repeller works automatically and may take a few days to show effective results, with a reduction in pest activity expected within 2-3 weeks. Technical specifications Type: Ultrasonic pest repeller Coverage: Suitable for home, warehouse, office, garden, hotel, etc. Power source: Plug-in Operation: Emits different frequencies of ultrasonic waves Installation Plug the device into a power outlet. Ensure there are no barriers (curtains, cabinets) in front of the repeller. For optimal results, place one device in each room. Usage