Air Purifiers features: Car Mute Negative Ion Air Purifier Car Oxygen Bar Machine In Addition To Odor and Formaldehyde-White Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. The high air volume absorbs and filters to solve all kinds of dirt floating in the air, and it only takes a few minutes to refresh the air. Negative ions cooperate with high-speed fans to eliminate harmful substances such as bacteria through smooth air ducts and large air volume, giving you a healthy travel. Effectively remove harmful substances such as PMBO, odor, formaldehyde, PM2.5 and so on. Features: Product name: Car air purifier material: plastic Battery voltage: 3.7V Battery capacity: 2000mAh (18650) Ion concentration: 5x10°PCS/cm3+10% Working voltage: DC - 5V Working current: 300mA (MAX) Product size: 68x68x160mm Suggested use area: 10 (O) Weight: 0.23 (kg)