Sharp IG-BC2UB High Density Plasmacluster Ion Generator for Car Use High density Plasmacluster Ion Generator fits into a car cup holder Plasmacluster technology refreshes the air and leaves it cleaner smelling Simple one-touch operation allows user to choose among 2 fan speeds (low and high) Library Quiet operation (silent mode is only 28db) Long life Ion Engine (up to 19,000 hours use without performance decrease)