... there is a red light emitting from the infraed sensors4.when the capacity of the disinfectant under 100ml,you should add disinfectantAutomatic Spary Alcohol ... ,are all sensors.When you put your hand near ,or under the sensor,it can spray automatically.4. This system software, a ... box, pull out a new battery, the battery using 1rd.7. Put the key on the cover lock, counter-clockwise, then lock body, vice ...