As for quality control, full range of quality assurance system has been established from the beginning of new product design, purchasing of raw materials and components manufacturing, assembling, packaging to the after-sale tracking. In addition, different quality control processes had been set up for new product launch and repeated product runs. Supplier quality engineers perform quality control on raw materials and outsourced parts at the source of supply. Through tracking and training with the suppliers to improve the supply chain quality and strengthen quality control during the manufacturing process, the quality sustainability and stability are both ensured.