... active ball: The far infrared ray which is a ray with anti-bacteria function. Safe , can not be melted to ... Features: 1) Healthy and natural water maker 2) Quadruple filtration: anti-virus activated carbon + KDF + super magnetic filtration system (optional) ... a) Residual chlorine, impurities, bacteria, algae, pesticides, chemical poisons b) Heavy metals, such as lead, copper, iron, manganese, mercury ...