32GB Metal U-disk High Speed USB 3.0 Memory Stick for Computers - Grey ?USB 3.0 standard interface U-disk, ensures stable and fast data transmission ?Metal shell material, fine workmanship, exquisite and stylish design ?No external power required, plug and play, no drivers needed ?Ideal for backing up files, movies, music, pictures, software, etc. ?Includes a metal chain and ring for convenient carrying ?Waterproof, shockproof, X-ray resistant, durable for long-term use ?Compatible with most computers and laptops Specification: ?Memory: 32GB ?Shell material: metal ?Size: 40*12*4mm ?Upload speed: 20-90Mb/s ?Download speed: 15-80Mb/s Package included: ?1 x U-disk ?1 x Metal Chain with Ring