Ultrasound mouse – This is our advanced version. Using ultrasound theory, change frequency to stimulate mouse’s auditory system and other pests, make them unbearable and feel uncomfortable. ?Wide Coverage Area – Ultrasonic Mouse effective for large area up to 800-1300ft. Please note that ultrasonic waves cannot pass through walls. Although our ultrasonic repellent works well, if you have a large infestation, we recommend placing our insect repellent in every room. ?Easy to use – This machine should be installed 80-120 centimeters from the floor. And vertical to the floor and plug into the power outlet. It can be plugged directly into the 110V AC power outlet (power range: AC 90V-250V Frequency: 50-60HZ). Commonly used in homes, warehouses, stores, hotels, hospitals, offices, etc. Larger areas may require more than one unit. ?Environmental and Safety Friendly – The product is non-toxic and eco-friendly, our repeller is 100% safe and effective, the ultrasonic frequency emitted by this machine is inaudible to human beings and pets. Safe for kids, family and pets. However, if you have a hamster pet at home, do not use this ultrasonic repeller. ??Note: For good results, four weeks of observation is required. The product has just started to be used and there are a lot of pests because they are driven out of the safe zone. do not worry If you have any questions, do not hesitate to contact us