What is difference between Vital Injector1 and Vital Injector2?

Q. What is the difference between Vital Injector1 and Vital Injector2?

A. The biggest difference is the upgraded contamination protection function.
Vital Injector2 has the removable filter on the right side of the main body which protects
the inside of the injector from contamination by impurities sucked in during treatment.
By putting the cover over the lower part of the needles it protects the mounting part of the
needles and makes its maintenance easier.
Finally it becomes more convenient to use with the newly enlarged LCD panel.