Our equipment is for domestic use and works to prevent the spread of harmful bacteria. The Zephair unit uses only 100% natural essential oil withy cold dispersal it into the atmosphere. The oils also act as an effective odour remover. A lemon fragrance is left after use. Using battery, USB connector or mains supply this small unit is versatile, and easy to use. At £10.95 this is a product not to be missed.Check out our website at . This and our other products are available for order on line.