Unique contrast design With a unique "Contrast Design" approach, Apacers design team combines the matte metal shell with a translucent cover to form a dual sight and touch contrast, add more aesthetic gradations with joyfulness when using the products. Portable and fashionable In addition to ultra-light touch, the smooth matte body is anti-drop and wear proof so that the user doesn’t worry about getting fingerprint marks on it. Ultra-high 256GB capacity Available in 16GB, 32GB, 64GB, and 128GB. AH25B allows carrying mass data for portable applications and realizing a digital life of unrestricted mobility!Interface:High-Speed USB 3.2 Gen 1 certified, backward compatible with USB 2.0 Power Supply:USB Bus-Powered; No external power required Systems Supported:Windows 10/8.1/8 Linux Kernel 2.6.x or above MAC OS 10.6.x or above Functionality:Plug and Play Dimensions:(L)52.7 x (W)17 x (H)8.2 mm Weight:7g