Shown is the 400 gram pack and the 1 Kilogram pack. These packs are designed for fitting into the return air duct of an air-conditioning system or in some wall or floor mounted split air conditioning systems. Or the pack can be opened as directed and placed in a moving air supply such as in the direct airflow from a fan or open window sill where the air is being drawn into the room. The Germxit product is the same as in the auto capsule, Dispenser or any of the other products shown Dispersment will take anything up to 30 days. Places of use school rooms, small hospital wards, office air-conditioning systems home air- conditioners, bathrooms where the air circulates.