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Color Classification：Cool Black Button*1+Ringing Bell*1（Self-Generating） Pearlescent White Button*1+Ringing Bell*1（Self-Generating） Cool Black Button*2+Ringing Bell*1（Self-Generating） Pearlescent White Button*2+Ringing Bell*1（Self-Generating） Cool Black Button*1+Ringing Bell*2（Self-Generating） Pearlescent White Button*1+Ringing Bell*2（Self-Generating） Self-Generating White One to One Self-Generating White Two Drag One Self-Generating White One for Two Brand：ZOGIN/Zhuojin Model：K19-WB