【Innovative frequency conversion technology】 Using the latest three-frequency frequency conversion technology, the frequency conversion and coexistence of ultrasonic and electromagnetic waves can effectively affect the neuroauditory system and prevent pests and mice from becoming immune to insect repellent. 【 Full coverage】Energy saving insect repellent can be widely used in houses, apartments, warehouses, shops, workshops, restaurants, hotels, etc., can prevent insects, mice, mosquitoes, flies, wasps, ants, spiders, fleas, cockroaches, etc. repel, 360°, low power consumption, high efficiency. 【Easy to Use, Just Plug in to Play】Just plug the Ultrasonic Bug Killer into a regular outlet, then the LED light will light up and start to work, easy to use and portable. Manufacturer recommends using one unit of about 80-120 square feet, if square foot exceeds 120 square feet, additional units are recommended. 【Safe and Eco-Friendly】No poisons, chemicals, traps and kills. Insect repellent