British EARTHMOVE Audio（UK00003931000 CN67588245 CN71824409） is committed to the R&D and operation of professional mobile audio with breakthrough and crushing advantages. The products are produced and tested by Maxi Semiconductor in China. Bulldozer Audio mainly serves industry leading users: musical instrument enthusiasts, K  For singing enthusiasts, camping enthusiasts, etc., the bulldozer product line has more than 2 years of iteration reserves.

 MACRO-X specializes in the R&D and OEM of electroacoustic products and energy conversion products, and welcomes cooperation with international brands.

 BTN-Industrial was established in 2013. It takes the mechanical and electronic industry as its development goal, adheres to core technology control and product upgrade iteration as the core of development, and launches various breakthrough industrial products for users.

推土机音响（UK00003931000 CN67588245 CN71824409）致力于具有突破性和碾压性优势的专业移动音响研发运营，产品由玛克西半导体在中国完成生产测试工作，推土机音响主要服务于行业头部用户：乐器发烧友，K歌发烧友，露营发烧友等，推土机产品线具有2年以上的迭代储备。

玛克西半导体（MACRO-X）专业从事电声产品，能源转换产品的研发和代工，欢迎国际性品牌合作。

BTN-Industrial 比田工业成立于2013年，以机械电子工业实业为发展目标，坚持核心技术掌控和产品升级迭代为发展核心，为用户推出各种有突破性的工业产品。