Posted 19 Jul 2020 Hi brothers. I'm going to use an Adam brand opc. I bought the product 2nd hand but there is no cdkey next to it. A product key is required for this product. Is there anyone who can help? Share this post Link to post Share on other sites
Posted 20 Jul 2020 Have you tried http://www.advantech.com ? Share this post Link to post Share on other sites