Winten 256GB USB 3.0 Flash Drive (up to 200MB/s), with rotating stainless shell design Save and transfer quicker with the 256GB USB 3.0 interface. Read 200MB /s(max), Write 110MB/s(max) Design with rotating stainless steel shell, 0.6 cm thickness Compatible with PC and Mac systems Compatible with USB 2.0 / 3.0 6cmX0.6cmX2.2cm LxWxH , Weight :23g