Ultrasonic Insect Repellent - This is our advanced version that uses the principle of ultrasound to change the frequency to stimulate the hearing system of mosquitoes and other parasites, making them intolerable and uncomfortable. Commonly used in homes, warehouses, shops, hotels, hospitals, offices, etc. Large areas may require multiple units. Please note that ultrasound cannot pass through walls. Although our insect repellant works well, if you have a lot of insect damage, we recommend that you place our insect repellant in every room. Environmental protection and safety - the product is non-toxic and environmentally friendly of the environment. Our insect repellant is 100% safe and effective. The ultrasonic frequency emitted by this machine is inaudible to humans and pets. Safe for children, family and pets. However, if you have a hamster pet in your home, please do not use this ultrasonic insect repellant. Delivery quantity: 1 * insect repellent
