Features: Durable zinc alloy shell, shockproof and anti-fall, better protect your valuable data. Adopt high-performance main control chip, faster and more stable data storage. The compact lightweight design allows you to take important files with you wherever you go. This U disk Features a cap-less design and a lanyard slot for convenience, easy to carry. Support mobile phone, tablet, TV, speaker and other USB interface devices. Specification: Type: Lenovo thinkplus USB2.0 U disk Model: MU221 Capacity: 8GB/16GB/32GB/64GB(optional) Material: Zinc alloy Interface: USB2.0 Transmission speed: Read speed: 15-25MB/s, write speed: 6-10MB/s Supported system: Windows XP/Win7/Win8/Win10, Mac OS X 10.5+, Linux 2.4.x+ Maximum voltage/current: 5V/200mA Item size: 4 * 1.21 * 0.46cm /1.57 * 0.48 * 0.18in Packing list: 1 * U disk