The main part of the filter, with the blue cap, contains the water filtering component. Remember to open the lid and remove the plastic surrounding this part for the filter to function correctly. Fast and Stable Flow Rate: Our faucet water filter system boasts an excellent high-flow design, providing instant access to a large volume of filtered water. Fill 4 bottles of water in just one minute. Convenient Design: A simple switch lever allows you to easily transition from purified water to regular tap water. The faucet also features a space-saving design, making it ideal for kitchens and bathrooms, simplifying face washing and cooking. Durable Faucet Filter: Compared to other faucet water purifiers on the market, this system stands out with its superior filter lifespan. It can be fully restored by cleaning with sandpaper. Deep contamination and filter membrane blockage are effectively prevented, ensuring fresh water quality. Installation Requirements: The filtered water faucet utilizes leak-proof technology and connects easily to your faucet. This faucet filtration system fits standard faucets. It is not compatible with pull-out, handheld, or spray faucets. Please check if our product fits your faucet before purchasing.