Function: that feature Odor Neutralizer Technology, with odor neutralization technology to prevent bad odor inside the vacuum cleaner.Yellow Zesty Lemon flavor. Easy to Install: No other tools required, align the arrows on the with the arrows on the nozzle, insert the odor neutralizer , and rotate the intensity dial to your preference. Recommended Replacement: It is recommended that the be replaced every 4-6 months to optimal results. Scope of application: Tailored for families with pets, smokers, or those who are passionate about keeping their homes fresh and clean at all times Compatible with AZ3000 AZ3002 HZ3000 HZ3002 IZ862H IZ562H ZD550 Vacuum Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:B: Aromatherapy Material:plastic Package Contents: 4 x Odor Elimination Replacement Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.