Established in 1998, Joinwit Optoelectronic Tech. Co., Ltd. is a joint-venture company which specializes in designing, R&D, manufacturing and selling optical fiber test instruments and equipments as well as passive components to domestic and overseas market. Fully compliance with ISO9002 certificate, Joinwit provides a broad range of high quality products such as Coupler Workstations, Light Sources, Optical Power Meters, Optical Multi Meters, Visual Fault Locator, Cable Break Locator and full spectrum passive components such as Connectors, Adapters, Patch cords / Pigtails, Couplers/Splitters/WDMs, Attenuators and so on, to more than 200 regular customers.