Safe-to-use, reliable and effective Air Doctor Portable Sterilizer Card is available with chlorine dioxide (ClO2). The gas is dispersed effectively and remove the bacteria and virus due to the oxidation force. This deodorizes unpleasant odors with its powerful and effective contents. It is available with a strong clip to make it easy to use anywhere like a name holder. This Air Doctor Portable Sterilizer Card is widely used in schools, offices, airports, hotels and other places for keeping it cleaned and sterilized.