General description This 4-Pack Ultrasonic Rodent Repeller utilizes advanced ultrasonic technology to effectively deter rodents and insects such as mice, rats, ants, and cockroaches. Designed for versatile use, it provides a powerful solution for pest control in various environments, including homes, warehouses, shops, hotels, hospitals, and offices. The device emits ultrasonic waves that are inaudible to humans and pets, ensuring a safe and quiet operation. Technical specifications Switching frequency: 60/s Power supply: 220V AC Installation Place the repeller 20-30 centimeters above the ground. Position it vertically and plug it into a power outlet. Usage Effective over a large area, ideal for multiple rooms in case of large infestations. Recommended to use one unit per room for optimal results.