Air Purifier for Large Room With H13 HEPA Filter, Remove 99.97% dust, pollen, allergens and harmful particles, Excellent CADR completely cover 1000 sq ft large office - BackNature KJ800F-A04 --------------------------- ▪ ★★★★★ ▪ --------------------------- ● Large House Standard - 800 CADR effectively covers 1000 sq ft office, even if it runs at full power is still quiet no noise. ● Negative Ions - 10 million negative ions are released into the air, which improves employees' mood and enthusiasm at work, and improves work efficiency. ● Excellent Quiet - 1000 sq ft office is without any noise at full power running. The sleep mode is quiet and only 34db, which is very suitable for employees to rest at noon. ● Certificate - CE / ETL / KC / ROHS ● Factory Capacity - 180,000 Units/Month.