About this item FUN FOR KIDS AND PETS: The ultra device is safe for children and pets. It emits sound frequencies that are unpleasant to pests such as rodents and insects. Highly intelligent technology: This rodent repellent uses advanced technology to emit ultra waves at varying frequencies, which disturb the nervous systems of pests. This causes discomfort and encourages them to leave the area. Intermittent frequency changes help prevent pests from adapting. Simple Design: The ultra pest control device is portable and easy to install. Simply plug it in to begin operation. Suitable for use in homes, warehouses, offices, gardens, hotels, and similar environments. Larger Coverage: Each unit effectively covers up to 30 square meters. For best results, install the device vertically at a height of 32 to 47 inches above the ground.