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.

推土機音響（UK00003931000 CN67588245 CN71824409）致力于具有突破性和碾壓性優勢的專業移動音響研發運營，產品由瑪克西半導體在中國完成生產測試工作，推土機音響主要服務于行業頭部用戶：樂器發燒友，K歌發燒友，露營發燒友等，推土機產品線具有2年以上的迭代儲備。

瑪克西半導體（MACRO-X）專業從事電聲產品，能源轉換產品的研發和代工，歡迎國際性品牌合作。

BTN-Industrial 比田工業成立于2013年，以機械電子工業實業為發展目標，堅持核心技術掌控和產品升級迭代為發展核心，為用戶推出各種有突破性的工業產品。