Holmes Air Purifier HAP9412B HEPA Type WITH IONIZER AND BRAND NEW FILTER (filter is never used but got bunched up somehow - see pictures) 29 Tested and working perfectly. We will test all features in front of you before you pay us. Holmes HAP9412B-UA Small Room HEPA Type Air Purifier 3 Speed Settings: Choose from 3 cleaning speeds to keep the air fresh and pure inside your home. Select a lower speed while your at home for continued purification with less ambient noise. Select a higher speed while away from home for maximum purification. Optional Ionizer: Negative Ions bind with airborne smoke, dust, and pollen to form larger particles that are more easily captured by the filters. When turned on, the Ionizer will make a soft, but audible, crackling sound. This is normal and indicates the Ionizer is working. Filter Reminder Light: A light will indicate when filter service is needed. This ensures maximum air purifier performance.