5. Free of charge for Type C transformer. 4. Plug and Play: USB flash drive supports plug and play without any software installation, just simple plug into the USB port of a computer or other devices, is compatible with Windows 98second edition/ NT/ ME/ 2000/ XP/ 7/ 8.1/ 10 and above, it also compatible with Linux and Mac OS 10.3 and above, support portable speakers, car speakers, car audio, TV and projector. 3. Interface: USB2.0, backwards USB1.1, Fast Data transmission speed, suitable for storing digital data for school students, business or daily usage. The digital data includes music, video, photos, movies, bidding&tender documents, softwares,etc. 2. Fashionable and Durable: Super mini design, waterproof, dustproof and shockproof. Small, light and easy to carry! Dimension: 22.5mm*12mm*6mm. 1. Guarantee!!! USB flash drives speed is expressed as the real speed, and pay more attention to the performance of writing speed: Thumb Drive is sufficient capacity( 1.85GB ) ,adopts international first-line brand A+ class chips, faster speed and better quality! Write Speed: 6MB/S-8MB/S; Read Speed: 15MB/S-18MB/S.