Guangdong Osalo Electronic Technology Co., Ltd have own factory with 17 years exprience in calculators industry. We have passed ISO9001\SGS\CE\UKCA ect international certification. We are the famous brand in calculators field: Osalo, Citiplus. Customer can choose our brand product or OEM and for OEM we will do strict confidential. We follow international standard adminstration and build up admin team with rich experience.