Guangdong osou Electronic Technology Co., Ltd. With its own factory and 15 years of industry experience in calculator industry. We have passed international certifications such as ISO9001, SGS, CE, UKCA, RoHS, WEEE, etc.
  We are a well-known professional brand in the field of calculator: Osaro, CITIPLUS. Customers can choose brand distribution or OEM, and strictly keep the OEM business confidential. The company has established an experienced management team according to international standards.