1. Year-round energy savings - Adjustable side frames enable millimeter-precise gap adjustment to block air leaks - Delivers continuous energy savings, improved living comfort, and reduced heating costs 2. Easy installation - Preconfigured side coverings ensure effortless window adaptation in minutes - No additional tools or equipment required for a smooth, practical installation 3. Air quality and comfort - Acts as a barrier against allergens and dust particles - Provides wind and noise reduction with robust insulation material and reliable sealing 4. AC load relief technology - Smart design minimizes load on the air conditioner - Protects against cold drafts in winter and excessive heat in summer - Improves overall efficiency Use scenarios - Living rooms with large windows: maintains stable temperatures, reduces energy consumption, and enhances comfort. - Bedrooms: minimizes drafts and noise for a quieter, more restful environment. - Offices or rental properties: enables quick, tool-free retrofit with consistent insulation and air quality improvements.