The Yellow Speed is a really small company in Taiwan, there are only 5 employees working there, it’s like a household factory, also there is no ISO approval for the products they make. It’s the company which specialized in pirating others’ products. In fact, Yellow Speed just founded before Oct. in 2010, the person who in charge of Yellow Speed company used to work in D2 company, but he got fired due to theft. So far D2 has started to sue the company, as I notice, they pirate D2’s patent as well. If there is someone who is interested in buying their products, perhaps it won’t be under any warranty as the company might be out of business at any time. P.S. You can post the message above to any website, chat room in public, if there are any unrealistic, we will take the responsibility.