Bolin is a leading professional manufactory and exporter of education equipment and energy saver and CATV products, such as Language laboratory ,Language learning system, Wireless Language learning system ,Multi-media classroom, Visual presenter, Language laboratory headset, Conference system , chemistry lab, physics lab, power saver ,energy saver ,programmable timer switch,computer headphone, headset, and so on. After around 8 years of development, Bolin has owned a professional and ...