1) all of our usb stick has CE,FCC,ROHS certification.2)PVC is very popular now,because it can be made every shape customer want,and it is very funny,so it is more attractive and the price is competitive.3)card usb is also fashional,because it is very thin only 2mm,it can be put in purse,carry conveniently.4)Now we have many diamond usb flash sticks,they look very luxurious,can be made into necklace or brooch,if you need we can send some photos for your reference.5)our usb sticks are all real flash real memory with hi-speed.