Wagan EL2022 Ionic Air Purifier Eliminates unpleasant odors and fumes from the vehicle's cabin Chemical-free and no filters to change Supplies immediate relief and fresh air for driver and passenger safety Eliminates bacteria, pollen and dust and helps relieve allergies, hay fever and asthma General voltage of DC 12V, 250mA; Negative Output of 1 x 10 ions/sec; Size of 4.6 inches x 1.5 inches x 1.25 inches