The CD12/AD features dual ozone reaction chambers with an efficient built-in air-dryer for the highest grams per hour and ozone concentration in a compact, air-cooled, self-contained package. To keep in-line with our other popular Mini-Series products, the CD12/AD includes a regulated universal power supply, and user friendly LED light operational status display. This product is so versatile it can be used in highly technical applications utilizing real-time 4-20mA control or simply operated in manual mode, both controlling ozone output 0-100%. Nothing in the marketplace compares to this highly reliable corona discharge ozone generator that is designed for product longevity and durability. Manufactured in the U.S.A., they are easy to install and maintain, and will provide years of superior service.