Shenzhen Chisheng Electronic Science and technology Co., Ltd is the high technology enterprise which specializes in audio electronic products designing and producing. We have rich experience in field of active noise cancellation headphone, strong background in blue tooth technology and network communication products. Our products -CS serial active noise cancellation headphone, music ear phone, are self-developed with independent intellectual property right. We not only pursue perfect quality,high efficiency but also pursue environment-friendly. Active noise cancellation itself is eliminate noise pollution. And all of our materials are in line with the ROHS standard, non-lead, non-mercury.CS let the music flowing in the quiet world. Excellent noise cancellation technology and fever level sound achieve CS as a leader of perfect audio products enterprise in China. We ensure we will devote ourselves to supply you the high quality products with best price.