Dongguan shengyu Tech ltd ,is specialised in producing mini bluetooth speaker and 2.1 speaker .Here is the briefly introductin for our factory as below :1. Year of established :2003 2. Main products: Bluetooth speaker ,mini speaker,multimedia speakers, home theatres. 3. Employees:300 4. Annual sales:USD 10,000,000 5.Production capacity:180,000 pcs 6.Social responsibility:ISO:9001 :2008 7.Customer:Sanwa, PAPPI, ANABELLA. Travelpac,Mobility etc. also we do our own brand Transwin and AlliES 8.website :www.transwin.com.cn & http://sztranswin.preview.alibaba.com...........