Product Features: Ultrasonic Technology: The Ultrasonic Pest Repeller use the dual ultrasonic and electromagnetic chips work simultaneously to disorientate the hearing and nervous system of pests to quickly and powerfully drive away most types of pest like mice, mouses, ants, mosquitoes, spiders, cockroaches etc. More Safe for Child & Pets: Our pest repeller is safer than traditional mosquito repellents. Ultrasonic sound is inaudible to humans and household pets, alternative to dangerous poisons and Sprayers, chemicals and traps, no bad smell and Corpses. Large Effective Coverage: The Insect & Rodent Repeller is effective in an indoor area up to 1200 sq. ft. It is widely used in homes, warehouses, offices, gardens, hotels, etc. We recommend you to install one for each room because the ultrasound cannot penetrate walls and solid objects. Please make sure there are no barriers like curtains or cabinets covering in front of the repellent. Easy to use: Just plug the electronic pest control ultrasonic repellent in power sockets. This time the machine began to work when the blue light on. Most customers can see the results within 3-4 weeks! Then we can say goodbye to pest and mice! Wide Application: This pest control ultrasonic can help you drive away all the pest, like spiders, mice, mosquitoes, rats, roaches, ants, snakes and so on. Great for indoor use, such as home, bedroom, living room, kitchen, office, warehouse, hotel, etc. If you have any problem, please feel free to contact with us . We hope you sleep comfortably and have a pest free environment.Week 1: Pest repeller starts working, and pests will feel discomfort.Week 2:Pest repeller keeps working, and pests will feel anxiety.Week 3:Pest repeller works effective, pests will begin to escape from their shelters.Week 4:You can be in a pest-free space.Product Specifications:Material: ABSSafety Devices: Built-in fireproof tankInput Frequency : 50-65kHzInput Voltage: 110-240VPower: 5-6WSize: 55cm * 45cm * 45cmOperating Temperature: -15-60Perating Temperature :1060Operating Humidity: 85%RHPerating Humidity: 85%RH.Helpful Information:1. Installation based on instruction and should be mounted 7 to 30 in from the ground vertically.2. The installing point should be avoided from carpet, curtain etc attaching sound material.Otherwise, the decrease of the sound pressure will do harm on the effect.3. Its normal that the mouse and vermin will increase at the beginning of the using days. Becausethey are moving away from their living place after the attack of ultrasonic.4. To increase the effect, you should use several sets of this machine at the warehouse or goodspile-up, for the best using range is 50 meters.5. Indoor use only and Keep away from wet area. Package Includes 4 Pack Ultrasonic Pest Killer Repeller