professional sound card professional audio 1 guangzhou songlai audio co., ltd. has long supplied paperless conference systems, multimedia conference systems, audio and video systems and supporting equipment. it has independently established the brand songlai audio, integrating r&d, production, direct sales and logistics and distribution. the manufacturer supplies spot stocks. the equipment quality is reliable, the sound quality is good, environmentally friendly, stable, cost-effective, transparent, and perfect service. welcome to call 18620731913. 30 strip