Features: 100% brand new and high quality Solid state storage, shock proof and electromagnetic proof. Durable and scratch-resistant. Rotating plug metal hook U disk metallic luster, and mirror finish. 24 Mb/S,high read and transfer speed of massive data, bring you a feeeling of pleasure. Supports hot plug play, high speed USB 2.0 port.speeds vary depending on types of file being transferred and computer configuration.. You can use the USB stick to back up your photos, your good memory videos, the music or books you want to listen in your car, the power point presentation or project files you need to use, very convenient for you. Package Includes: 1 X USB Flash Drive Specifications: Read Rate:24 Mb/S Write Rate:10 Mb/S Interface USB 2.0 Color: Black/Silver Size: approx: 1.9x1.16cm/0.75x0.56in About capacity: 4GB = approximately 3.6GB-3.9GB 8GB = approximately 7.4GB-7.8GB 16GB = approximately 14.2GB-15GB 32GB = approximately 28GB-30GB 64GB = approximately 58GB-60GB 128GB = approximately 110GB-120GB note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment. No external power supply requird. The calculation difference between manufacturer and your PC, please search Memory card capacity to get more information. Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes.The pursuit of the perfect person is not recommended to buy.