Finally an electronic conserver that eliminates worries over battery life. With a minimum of 2 years of operation using just two AA batteries, extra trips just to change batteries are a thing of the past. The EVOLUTION™ is one of our most versatile devices. Its highly sensitive technology can sense both weak and strong inhalation patterns with remarkable accuracy, facilitating its use across a very broad range of patients! Learn how this reliable and clinically effective product can help you same time and money, meet the clinical needs of your patients and ensure customer satisfaction.