1. [Upgraded negative ion technology] The air purifier uses upgraded negative ion technology, which can quickly and effectively eliminate odors and is beneficial to health. 2. [Safety upgrade] It is powered by a USB ultra - low voltage, ensuring electrical safety. Moreover, it has wide compatibility and can be used globally. 3. [Sleep easily] This air purifier meets the quality and performance requirements. The low noise allows you to fall asleep easily without worry. 4. [Powerful functions] It is equipped with a strong adsorption and activated carbon filter, which can adsorb dust, smoke, impurities, odors, etc. 5. [Widely applicable] It is suitable for various scenarios such as cars, homes, and offices. The compact size brings a better experience. Working voltage: 5V Battery capacity: 1800mAh Applicable area: Less than 10 square meters Noise: 15 - 20dB Dimensions: 75 x 75 x 170mm Material: ABS Color: Black Package contents: - 1 x Product - 1 x USB data cable - 1 x Instruction manual in Chinese and English Only the above package contents are included, and other products are not included. Note: Light reflection and different monitors may cause the color of the item to vary slightly from the actual one. A measurement error of +/- 1 - 3cm is allowed.