describeProduct Description:Ultrasonic insect repellents emit ultrasonic waves beyond the hearing range of humans and pets. No chemical substances, no radiation, no odor.Easy to use: Simply plug the device vertically into a household power outlet. It is recommended to install the equipment at a distance of 30-70 inches from the ground. The blue LED lights up to indicate that the device is working.Wide coverage: This insect repellent is suitable for homes, offices, garages, warehouses, attics, hotels, basements, supermarkets, etc.One room, one machine: Install ultrasonic insect repellent, away from sound-absorbing materials and solid objects, to allow ultrasonic waves to spread.All products undergo rigorous testing before shipment. If there are any issues with our product, please feel free to contact us at any time. We will be responsible for our products and do our best to ensure that yousatisfied. Specifications:Product Name: Electronic Ultrasonic Insect RepellentMaterial: ABSProduct specifications: 9.5 * 5.2 * 5.7cmWorking voltage: 110V/220VQuantity: 4We have two types of plugs: 110V American plug and 220V European plug. The default plug we ship to Brazil is a 110V American plug. If you need to replace it, please contact me through the order after delivery.Purchase precautions:-We suggest installing it vertically at a distance of 7-31 inches from the ground. And ensure that there are no curtains, cabinets, or other obstacles in front of the pesticide.-Install at different heights according to the type of pest: for crawling pests, 10-30 inches above the ground; For flying insects, stay 30 inches above the ground.-Please note that our ultrasonic insect repellent can work for 3-4 weeks, depending on the number of pests.Then we can bid farewell to pests and mice.Packing list:4 x Electronic Ultrasonic Insect Repellent Attention: 1 The known dimensions are for reference only. Due to different measurement methods, an error of 1-3 centimeters is allowed. Thank you. Different computer monitors may have slight color differences, please understand.*Dear customer. After purchase, if there are any issues with our product, please contact usOrder information through the free market. In this way, we will reply within 12 hours and solve any problems for you.*If you submit a claim through Mercado Libre, the platform expects to take 10 working days to review your claim. However, if you contact us directly, the issue will be resolved quickly and effectively* Suggest not to demand an open free market.