PTKSAI is a big manufactory in China,Website:http://www.ksaiandroidposs.com, which has a history of 25 years. The main products are industrial displayer series, advertising machines, touch monitors, USB monitors, LCD Displays, Android CCTV monitors and advertising players. Our CCTV LCD monitor system is widely used in retail, restaurant, fast food chain, department, supermarket, hotel and so on. And our customers are from different countries, such as USA, Germany, Czech, Netherland, UK, Australia etc.