This is the electronic device for the upper part of the filter, compatible with the Amway eSpring 2 water purifier, from the current model to the 2009 model. Repairing it at Amway Japan costs around 20,000 yen. This is the latest REV2.4 version, just arrived! If you're having trouble with the warning sound, click here! → #MustSeeBeforeFilterReplacement!