Household Air Purifier Negative Ion Generator HEPA Deodorize PM2.5 Harmful Gas Filter Purifier Replaceable Filter Element Note: It is no built-in battery, USB cable must be connected to work. Functions: -Activated carbon filter -Blue light UV antibacterial -High efficiency HEPA filter -Remove formaldehyde and odor -Remove PM2.5 allergen -Removal of bacteria and viruses - filter secondhand smoke - Suitable for mother and baby grade Specifications: Rated voltage: 5V Rated frequency: 50Hz Wavelength: 265Nm CADR of particulate matter: 163m/h Particulate CCM: P4 Formaldehyde: 31.5m/h Formaldehyde CCM: F4 TVOC: 40 / h Toluene: 40 / h Noise: 35dB Sterilization rate: 99.99% Product size: 112*113*170mm Package included: 1 x Air Purifier (There is a filter inside) 1 x USB Cable 1 x User Manual Heartfelt recommendation: It is recommended to buy a spare filter element, you can replace the filter element every 3 months in order to achieve the best purification effect. Pay attention to the (O2/O4HEPA filter) element when purchasing accessories Note: 1. Please allow a difference of 0.5-1cm due to manual measurement. 2. Due to differences in light and screen, the color of the item may be slightly different from the picture.