Langsdom/兰士顿
Producers/Manufacturers:

Guangzhou Langston Electronic Technology Co., Ltd./  广州市兰士顿电子科技有限公司

Dongguan Dulan Electronic Technology Co., Ltd./  东莞市都阑电子科技有限公司

Official Websites/Webstores:

https://audio.langsdom.com/

http://www.langsdom.com/

https://langstoncn.1688.com/

https://shop817a93a241851.1688.com/

https://lanshidun.tmall.com/

https://mall.jd.com/index-1000010645.html

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