Intelligent contactless sterilizer effectively kills COVID-19 When the product senses that an object is approaching within a distance of 0-50CM, it is immediately sprayed with disinfectant, from the object approaching to leaving, only once. When the product senses that an object is approaching within a distance of 0-100CM, it immediately enters the state to be sprayed until it approaches the object to leave, and sprays once after a delay of one second. Spray only once when the object approaches and leaves, this mode is suitable for many scenes Such as elevator, bathroom elevator, office, school, hotel, kitchen, living room, bedroom, laundry room, car, etc. Considering that the product application scenario is too broad to find a suitable power jack in all application scenarios, it is specially designed to be powered by three AA batteries. Even with three AA batteries, it can provide 700-1000 spraying times under the large spray setting, so that the product can start working immediately on various occasions.