Easy to use: Automatic Infrared sensor, detects area within 5cm and sprays disinfector automatically within 0,5s, 350ml alcohol volumetric flask enough for several months. Large capacity:The built-in bottle has a large capacity of 350ml, which equals around 600 sprays. Provide automatic dosage of fine each use. Easy to Use: No installation is required, just place it on any flat and to use. Convenient and Hygienic:Just put your hand under the sensor to the soap dispenser, you can effectively avoid infection without touching the soap dispenser. Suitable for public places such as offices, hotels, hospitals, institutions, schools, etc.