DOSER Device/Counter A management device and counter for metered dose inhalers (MDIs). Automatically records usage with each inhalation. Stores information daily up to 30 days. Beep alerts user when inhalation has been registered and when fewer than 20 inhalations remain. Bright, easy-to-read display. Resets easily for prescription changes. Lightweight unit with flexible gripping cup fits most MDI's. Lasts one full year.