Quick Disinfection-- Built-in precise infrared smart sensor. Automatic: The alcohol automatically sprays when you place your hand in front of the sensor on infrared. Sprayer design with touchless motion sensor, eliminates cross-contamination and ensures optimal hand hygiene. Transparent strips can be used to visualize internal liquid consumption and track the amount of liquid remaining.Quality Material-- Induction 0.25s, induction distance 3-5cm, IPX4 water resistant level. What you do is insert a 4 * AA battery (Note: Batteries are not included in this product.)The product is made of ABS, which can keep it clean and shiny for a long time and effectively prevent leakage of liquid. Please use waterproof batteries to improve product safety.Energy Saving-- High performance miniature motor, low energy consumption and quieter. Infrared sensor technology. A new saving method can reduce spray liquid and consumption by 50%. Normally, you don't need to stop the device, it will automatically sleep when not working.Use widely-- Infrared sensor helps to automatically eject the liquid, avoiding the spread of bacteria caused by contact. home, office, school, kindergarten, cinema, bank, hotel, shopping mall, cafe, bar, hospital and many other public places. It is an indispensable disinfection product during the epidemic prevention period, it protects the health and safety of you and your family.