Compatible with Eufy Omni S1 Pro vacuum cleaner. This is not an OEM product. Any use of the brand name or model name is intended solely to demonstrate compatibility. Please verify your model before ordering. 4-pack value: Includes four Omni S1 Pro HEPA filters for long-term replacement. A cost-effective way to keep your robotic vacuum running smoothly. High performance filtration: Upgraded Omni S1 Pro filters capture up to 99.9% of dirt, pollen, and small particles. Replace every 1-2 months to prevent dust from entering the motor and to extend the vacuum’s service life. Premium materials and build: Made from high quality, environmentally friendly materials with excellent workmanship. Rounded corners reduce the risk of hand injuries during handling. Use scenarios: - Allergy-prone homes: helps reduce dust and particulates in the living space. - Homes with pets: controls pet dander and hair buildup for better air quality. - After renovation or dusty cleaning: manages increased particle load to maintain suction and performance.