- TiO2 Photo-Catalyst、 activated carbon filter for your option<br />- Adsorbing harmful gas、 smoke、 dust、 particulate and volatile organic compound etc. by the carbon filter<br />- Input Voltage: DC 3-5V<br />- Effective area: within 12 square meter<br />- Comes with a USB power cable<br />                                                                                                                                Dimensions: 3.78 in x 3.39 in x 3.39 in (9.6 cm x 8.6 cm x 8.6 cm)<br />Weight: 12.38 oz (351 g)