Contact person：Rock 
Mobile: +86-13826595161 
E-mail:rock@r-tone.com
Office address:2A3011, COFCO Yunjing Plaza, Martin Street, Guangming District, Shenzhen, China
Production address:502, Building C40, Xinwei 3 Industrial Zone, Xinzhuang Community, Matian Street, Guangming District, Shenzhen