Shenzhen Topunion Digital Industrial Co., Limited, is a professional manufacturer and exporter for digital digital audio and video products, integrating with research and sales department. We possess professional experienced engineers, special design and development ability.Replying on powerful R&D team, Topunion has established a long-term and stable relationship with clients all over the world and with its products field in 2.0ch & 2.1ch multimedia speaker system and 5.1ch home theater peaker system, mp3/mp4,car audio, dvd player, dvb etc. With rapid developmengt, we have formed a completed manufacturing roup and a strong sales team in the field of electronic products. Our aim is to be a professional production base and resource agent for every client to produce or purchase from China.