Shandong International Trading Com., Ltd. set up in 1999 years. We are one of the most important suppliers for telecommunication maintenance. We mainly aim to development for cable fault locator, optical tester and other network testers. We have the professional research and developing teams, which will help you to solve the technology problems, also can do some products modification as your order. At the same time, they will offer their experience to our customers to help them to use the testers quickly.