Feature: 1. USB2.0 pen drive support high speed transmission, 4‑10mb/s writing speed, 10‑20mb/s reading speed. 2. Plug and play without a driver, can read and copy files, photos, videos, etc. directly. 3. Can work with the equipped type‑c adapter to expand mobile phone memory, provide a convenient means of storing. 4. Compatible with most USB devices in the market, mobile phones/computers, etc. Zinc alloy body with metallic surface, elegant and compact. 5. Comes with metal keychain allows you to carry the U disk everywhere, even it is small, not easy to lost. Specification: Item Type: USB Flash Drives Material: Zinc AlloyType: Drive FreeSupport System: (Above for Windows98) support for Windows 98/Me/2000/XP, for Mac OS 9.x/ for Mac OS X/ for Linux2.4.xInterface: USB2.0 Computer: Suitable for IBM PC, for MAC PC or laptop, etc. Speed: Maximum writing speed 4-10mb/s, Maximum reading speed 10-20mb/s Application: Backup files, videos, etc.Operation: Plug and play. Package List: 1 x U Disk1 x Type-C Adapter1 x Hanging Ring Note: The displayed capacity is different from the nominal capacity because the calculation method is different.Manufacturer Standard: 1GB / 1000MB / 1MB = 1000KBRegarding Available Capacity:4GB =Approx.3.4GB‑3.8GB8GB=Approx.7.4GB‑7.6GB16GB=Approx.14.5GB‑15.5GB32GB=Approx.28GB‑30GB64GB=Approx.58GB‑60GB128GB=Approx.119GB‑124GB256GB=Approx.249GB‑250GB512GB=Approx.498GB‑500GB