QC of finished product: Our company has established corresponding procedure and certificated file. Carrying out dynamic management and control according to GB2828, sample Ⅱ standard and our corresponding certificated rules. Meanwhile, it should undergo rigorous environment tests. Such as aging test, high & low temperature test, temperature concussion test, solar radiation test, caught in the rain test, fall down test, shaking test and so on. They are tested strictly in accordance with US-MIL-810C, D, E standard and the reliable tests guarantee the high Q&C to ensure them to make a stable specification & excellent performance in all kinds of working environment.