Waterproofed This product has been waterproofed after processing, so you can use it with peace of mind. Amway eSpring II eSpring Water Purifier Electronic Components This is a special product, so please read the description carefully before purchasing. *This model frequently experiences cartridge display errors, causing warning sounds. Repairing it at Amway Japan costs over 10,000 yen. *It can be used without the warning sound, so you can replace the cartridge at your own timing. The replacement time for the eSpring II water purifier cartridge is 1 year or 5,000L (approximately 13.7L per day) of purified water usage. Most people end up replacing the cartridge before using 5,000L (approximately 13.7L per day). In environments with low usage frequency, the cartridge replacement lamp and warning sound will activate before the 5,000L is used up. It's a waste to replace the cartridge before using 5,000L, so this electronic component only silences the warning sound. According to evidence, the purification function is maintained as per the catalog specifications for 1,000 liters after the replacement lamp comes on.