Multi-stage activated carbon block replacement filter with uv lamp. it has a lifespan of 1 year (if you have used 5000 liters of water one year ago, the filter should be changed). the espring™ water purification system notifies you when it's time to change the filter, warns, and resets itself after plugging in. a maximum of 10 units of this product can be ordered. swordslife reserves the right to cancel orders over 10. more than 5 stocks will be offered for sale at the promotional price. buy the selling price of the product you reviewed. it is set by the seller. a product can be sold by more than one seller. the seller with the highest score determined by price advantage, delivery speed, return rates, and overall service quality, taking into account customer satisfaction on the product list and detail pages, becomes the visible seller. other sellers are listed as alternatives on the product detail page. the stated price is valid until march 19, 2026. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.