Manufacturer of GPS vehicle location, GPS suppliers Website: http://www.sjt, hk Tel :086-0755 -84673976 / ... . of Shenzhen City, founded in 2000, is specialized in GPS locator, GPS locator and other R & D, production and sales of high ... price, quality assurance! Class service! Products include: GPS, mobile phones for the elderly with GPS, GPS mobile phone security monitoring, multi-positioning devices ...