EASTBULL USB Flash Drive Feature & Specifications: Chip: Grade A. Capacity: 16 GB Interface Type: USB 2.0, backwards compatible to USB 1.1. Compatibility: Desk PC, Laptop, Mac, Tablet, Speaker with USB port. Operating System : Windows 7/Vista/XP/2000/ME/NT, Linux and Mac OS. USB Flash Drive Size:2.2"×0.8"×0.4"(Fold) Hand Wrist Strap Lanyard Size: 7.09" Package Includes: 20 x flash drives ( 2x Black, 2x Blue, 2x Gray, 2x Green, 2x White, 2x Orange, 2x Purple, 2x Yellow, 2x Pink, 2x Red. ) 20 x Lanyards ( 2x Black, 2x Blue, 2x Gray, 2x Green, 2x White, 2x Orange, 2x Purple, 2x Yellow, 2x Pink, 2x Red.) Friendly Tips: The actual available capacity for data storage is less than what is listed on the products,because some of the listed capacity on a flash storage device is used for formatting and other functions. Services: Thank you for choosing the EASTBULL USB Flash Drive. 1. Please feel free to leave us a message if you have any questions. We will reply to youwithin 24 hours and offer you our best services. . 2. If you are satisfied with our products, please leave us your valuable feedback or product . We appreciate your support. 3. Before you leave , please first about your problem and we will reply to you ASAP to find out the best way to resolve it.