The serial number of the sound card. According to the query on the Shengbaile official website, the white barcode on the Shengbaile sound card is the serial number of the sound card, which is used to identify the device for system settings, software activation, after-sales service and other operations. Shengbaile is a trademark applied for registration by Shenzhen Tangmaike Technology Co., Ltd. at the China Trademark Office on March 28, 2017. The products represented by this trademark include amplifiers, speakers, microphones, sound transmission devices, cameras, cameras, Projection equipment, signal transmitters, cameras, optical lenses for cameras, etc.