Please refer to introduction as attachment, Goodark has many years history in semiconductor, it accepted by many company step by step ,such as Phlips, SIEMENS, AUX, Haier ,Haiwei, ZTE, Apple ,and so on.Goodark industry is locate in Suzhou,they can give great support whatever service or technology.Either price or qulify we have confident to recommend this brand,Please contact with me freely if you have any question, thank you!