Aprilaire Humidifier 600 Automatic includes: Humidifier with one media panel and these four (4) included accessories:  24 volt transformer, saddle valve water pipe connector, outdoor temperature sensor and manual humidistat. The only difference between a manual and a automatic humidifier is its attachment to an outdoor sensor. It has nothing to do whether or not it is a digital or non-digital humidistat. New in box. Box was opened to photograph the contents for this listing. Instructions included. This is surplus stock from a retired Heating and Cooling repairman. Box has some blemishes from being stored.