... CHILD CUSTODY FUNCTION,COLOCK,CHANGE FILTER EASY,RO system,water Digital RO water system It has 5stages Ro system inside ,usually we ... make 75GDP,all the filtings are quick connecter. Digital UF water system It has 5 stages UFsystem inside ,all the ... without any clean water system inside .It is better use with Ro system and any other water purifier.(RO system,water treatment product,water purifier)