MBI is a company that possesses some 25 patents worldwide by research and development of bicycle hub internal transformer and electric two-wheel motor transformer for 20 years. MBI began its manufacturing of hub built-in 3-gear transformer as the first in Korea and fourth in the world in January 2011 and this product is the one with the most excellent functions that have adopted the world’s first acceleration-type turning transformation method compared to other competitors. In the future, we are committed to grow into world best transformer specialty company on the basis of unyielding technology innovation and we hope you to have your unyielding interest and encouragement.