http://www.usa.canon.com/cusa/support/consumer/projectors_visualizers/projectors/lv_7590?pageKeyCode=writeReviewPage
LV-7590
20890
Features
Automatic Filter Replacement
| The projector monitors the speed of air flow through the
cartridge-style filter to determine its condition, and
automatically advances the filter when needed. Each filter
cartridge is good for 10 automatic filter changes before
physical cartridge replacement is necessary.
 |