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Group Introduction

Three-In-One Enterprises Co., Ltd. (Tio) was established in Taiwan in 1974. Tio is a professional and well-known manufacturer of Auto testers, Automotive tools, Auto Windscreen tools, DIY tools, Refractometers, Industrial Endoscopes/Borescopes, Medical endoscopes, and other OEM/ODM products based on the demands of customers.

We constantly upgrade ourselves to meet international standards in any aspects and also be part of technology tendencies in the market. With our professional product development team, we can provide not only the high-quality products but also the instant support to our customers.

Three-In-One Milestones

Our President


Mr. Edward Chen

We focus on R&D and continue to develop related products. We are doing our Best. Thank you for your support.


We have partnership with Texas Instruments, National Chuang-Shan Institute of Science and Technology in Taiwan, and Industrial Technology Research Institute.