Headquartered in Shenzhen special econmic zone, Shenzhen Teswell Technology CO, Ltd is a leading provider of vehicle audio and video surveillance, GPS monitoring, intelligent bus dispatch system and other products. Our company is a high-scientific and technological enterprises that integrates R&D, design, manufacturer and marketing.Our products have passed the ISO9001 international quality certification, and took the EuropUnion CE certification, the U.S.FCC CERTIFICATION, E-mark certification.