Ultrasuon protection Dog repellents only emit ultrafine wave from 13(br)5KHz to 45(br)5KHz, which is safe to human body and harmless to human body(br) At the same time, it does not contain chemical and hazardous substances(br) It will only make animals without harming them(br) The humanized design will not harm your cats, dogs or other pets(br)Infrared sensor The nose of the owl repeller is an infrared sensor (PIR), capable of detecting animals of all sizes(br) The effective area covers an arc of 120 degrees and a distance of up to 30 feet (10 m)(br) Once the pets enter the 30ft radius, the motion sensor will emit ultra-fine waves and the LED light will make the pet feel uneasy and run away(br)USB charging and solar energy: There is a solar panel on the owl's head Let the owl absorb energy when there is sunshine(br) Besides, it has a 1500 mAh rechargeable lithium battery It is also possible to charge the ultrasonic repeller via USB power supply(br) 5 adjustable modes Irregular and variable frequency makes it more efficient to hunt the most aggressive animals that can adapt and become immune to a particular frequency band(br)Note: If you have bad weather or bad weather, it is advisable to wear it at closing time(br) Can be installed anywhere in the house, garden or patio, gardens, yards, paths, fields, practices, edges, garages, farms and all outdoor areas(br)