Product Description This Plasmacluster Ion Generator Unit is essential for maintaining the performance of your air purifier. Designed to emit highly concentrated plasmacluster ions, it ensures your environment remains clean and fresh. The unit requires periodic replacement to continue functioning at its best, with a general guideline of approximately 2 years, depending on usage patterns. Product Specification Model Number: IZ-C90M Weight: Approx. 30g Size: 8 x 3 x 5 cm Type: Plasmacluster Ion Generating Unit Total Operating Hours: Replace after approximately 17,500 hours (about 2 years if operated continuously 24/7, or about 6 years if used 8 hours a day) Compatibility: Suitable for various models including KI-HS40, KI-GS50, KI-HS50, KI-HS70, KI-JS40, KI-JS70, KI-GS70, KI-JS50, KI-LS50, KI-LS40, and many others. Usage The Plasmacluster Ion Generator Unit should be replaced when the lamp on the unit blinks, which occurs after approximately 17,500 hours of operation. This is a signal that the unit is nearing the end of its effective life and will soon stop emitting ions. For continuous 24-hour operation, expect to replace the unit approximately every 2 years. For daily use of about 8 hours, replacement can be extended to about 6 years.