C4 Development Limited is specialized in police and traffic products. Our objective is to develop outstanding alcohol breath analyzers. Our major products are different kinds of alcohol breath analyzers. Over the years, our Alcovisor breathalyzer series have been widely used in both professional and commercial markets.Our evidential model is one of the major breathalyzers used by traffic police all over the world. Other professional users such as transportation companies, construction companies, labs and hospitals, and professional drivers are also satisfied with our products.