Shenzhen Vanwin Tracking Co.,Ltd ,is one high-tech industry specializing in R&D ,production,sales of vehicle video monitoring system,3G/4G/GPS monitoring kits, intellectual public transit dispatcher`s monitoring system ,video people counter . Our products refers to SD HDD mobile dvr,3G remote control monitoring dvr,vehicle multi-media Ads machine,car camera,software .They are widely used in public transport,passengers traffic,logistics,law enforcement cars,escort and so on .With very strong rese