Compatible with USB air coolers This replacement filter is designed to fit USB air coolers, helping maintain performance when you replace the filter. Healthy for the body Made with high-quality raw materials and advanced nanotechnology to deliver clear, healthy air and help protect your family’s health. Easy to install No tools or complicated steps needed. Install in about 2 minutes. High quality filtration Jiuson replacement filter effectively blocks impurities, dust, and other particulates to improve air purity. What you get 1 x air replacement filter (without air cooler). If you receive a damaged package or it is damaged during use, please contact us for replacement or refund. Use scenarios - Home or office desk: enhances air quality while you work or relax. - Nursery or bedroom: helps provide healthier air for children and family. - Travel or dorm: convenient, USB-powered filtration for small spaces.