CUCKOOs revolutionary In & Out Electrolysis Sterilisation System is an innovation that allows your CUCKOO Water Purifier to clean itself, including its faucet and drain tube, ensuring that you and your loved ones can enjoy clean and safe drinking water every day.FEATURES Worlds First In & Out Electrolysis Sterilisation SystemNew-generation Filter Nano Positive Plus FilterNew-generation Filter Natural Plus FilterStreamlined designVoice Navigation (English, Malay, Chinese)Energy-saving instant hot water dispenses hot water within 3 secondsFixed dispensing function half cup, full cup or continuous dispensingEnergy-eye sensorCompact size (18cm) and slimmest design