Trusted Certifications: Waterdrop X8 reverse osmosis system is certified against NSF/ANSI 58 for TDS reduction and NSF/ANSI 372 certified for lead-free material to ensure your water safety and quality. Advanced RO Filtration: This undersink reverse osmosis water filter effectively reduces Chloride, Lead, TDS, Fluoride, PFOA, PFOS, Sand, Odor, Taste, Salt, and more. It boasts a 9-stage filtration including 0.0001μm RO membrane to guarantee water safety and quality. Tankless Ease: This reverse osmosis water system has a compact and stylish look. Compared with the traditional tank RO system, it saves 70% undersink space. You can effortlessly replace the filters in 3s without moving the system or using any tools. 【Note: This reverse osmosis system requires under-sink electricity.】 Efficient Filtration: The reverse osmosis water filter can filter 800 gallons of pure water per day. By its 2:1 low drain ratio, this system can produce only one cup of wastewater for every two cups of pure water, which is ideal for daily drinking and cooking. Intelligent and Precision: This tankless RO system boasts a smart faucet to track water quality with real-time TDS monitoring. And its filter life reminder function can help you replace filters in time to ensure your drinking water quality. The 24-month RO filter lifespan saves you the hassle and cost of frequent replacement. 【X8 Note】To enjoy the advantages of alkaline mineralized water, you can replace the WD-F1G filter with our WD-F1A filter when it expires.