(1) POWER DRY directs ionized, ozonated air through the bag to dry and deodorize gear (2) BLOWER a portable dryer with independent heat and ozone controls and a three-hour, auto-off timer Just plug it in and turn it on to dry and deodorize equipment in a few hours. Fits all Shock Doctor Power Dry Bags and Accessories Ozone levels conform to EPA and FDA regulations and are safe for use indoors.