Buy on Indiegogo
https://www.indiegogo.com/projects/livall-the-first-detachable-open-ear-headphones/ref/26296620/kate
Email: user@livall.com
Tel: (+86) 198 6694 6696
Mon to Fri: 9am-6pm(PTS)
Address: 4th Floor, Building 8, No. 919 Huawei Road, Xiangzhou District, Zhuhai City, Guangdong Province, China 519075