Dong Chang Optical Instruments Co. Ltd. has been manufacturing a variety of binoculars, including compact and disposable binoculars for over 15 years. We are very famous for producing 4x30 binoculars in China. In year 2006, we exported 500,000 items to USA, Canada .Our factory produced binoculars for a lot of world&＃039;s famous companies, Vivitar is our main customer. Our quality control department has highly trained staffs that strictly ensure the high quality binoculars by utilizing sophisticated QC equipment. All of our operations are conducted in accordance with ISO9001 standards, thereby guaranteeing maximum satisfaction. .