Using ultrasound chip technology. The use of ultrasound constantly stimulates and interferes with the auditory system and nervous system of insects, making them uncomfortable, destroying their living environment and causing them to flee their homes. Ultrasonic Mosquito Repellent , electronic mosquito killer, mouse killer, mice, cockroaches, mosquitoes, flies, ants, spiders, insects are very easy to use, just plug it in. Very suitable for indoor use, such as homes, restaurants, hotels, hospitals, office buildings, warehouses, etc. The mosquito repellent is safe, non-toxic and radiation-free. The ultrasonic frequency is inaudible to humans and pets. She is animal friendly. Ultrasonic insect repellent is guaranteed to be safe for your family and pets. Quiet and effective ultrasonic insect repellent is used with low frequency ultrasound, which means it can provide you with extremely effective pest control. silent without disturbing you and your pets. The use of the latest acoustic technologies and nervous system ultrasound chips makes them unpleasant and uncomfortable, which will keep them away from the house and away from approaching. Dear from the house. This low light system equipped with ultrasonic insecticide is suitable for an area of 120 square meters. For best results, it is recommended to use patches and insect repellents, because ultrasonic waves cannot penetrate walls and solid objects. Ultrasonic mosquito killer, electronic mosquito killer, mouse killer device , Rats, cockroaches, mosquitoes, flies, ants, spiders, insects Product specifications: green. Material: ABS plastic. Package includes: a set of 2 insect repellents with ultrasound Keep out of reach of children. Not included