Shenzhen Tuan development Co., Ltd As a leading digital product manufacturer,  Shenzhen Tuan development Co., Ltd in,manufacturing and distribution of portable audio digital products,covering MP3 player,MP4 player,PMP,digital photo frame and U-storage device etc.With creative design and high quality, our products are popular in America,Europe and Middle East.Thanks to the first-class capacity of  Our company. as well as manufacturing,we can provide our clients all over the world with outstanding and professional service.