Metalwork zinc-alloy one-piece design with strap hole; waterproof, dustproof and shockproof (COB). Interface: USB 3.2 Gen 1 Type-A. Read speed: up to 100MB/s (32GB-64GB), up to 140MB/s (128GB-512GB). Capacities: 32GB, 64GB, 128GB, 256GB, 512GB. Lifetime warranty.