KOOTION 3PCS 16GB USB 2.0 Flash Drive Waterproof Metal Memory Stick Thumb Drive Pen Disk ( 3 mixed color: Black,Sliver,Gold ) KOOTION U999 is a USB 2.0 flash drive that incorporates functionality and capability in a superb design. KOOTION U999 stands out by its exquisite zinc alloy metal casing and its elegant titanium color. It features an ergonomic circular shape design at the end of the drive that allows more comfortable usage and grasp, it can be perfectly fitted on a key chain or in a bag holder. Equipped with a Super Speed USB 2.0 interface, KOOTION U999 enables a blazing fast data transfer that meets the demands for high speed and real efficiency. KOOTION U999 utilizes the advanced Chip on Board (COB) packaging technology, making it waterproof, shockproof and dust proof.