1. Built-in three-layer filter, filtering effect increased by 16 times, can filter PM2.5 microwave particles. 2. LED brightness adjustment, 20% brightness increase. 3. Air volume adjustment, can adjust the air volume. 4. Stretch and enlarge the size, you can use the IPAD maintenance work. 5. SUNSHINE thick section special silicone pad. 6. Thoughtful bayonet design. 7. Wide voltage design, better suitability.