... delivery guaranteed! Delivery1,directly ship the goods from our factory to tremyour door by Express(FedEx,UPS,EMS or DHL) 2 ... UnionCertificateTUV ISO9002 ,AJA ISO9001,CE,FDA,ect. How to use and protecte glasses?1,Please wear or put off the glasses with your ... find the screw is loose in hinge,pease don't wear untill the screw be tightened.3,Please clean the lenses ...