Specification:* Brand: Lenovo thinkplus* Model: MU221* Capacity: 64GB, 128GB, 256GB, 512GB, 1TB* Interface: Type-C 3.1 & USB 3.1 * Material: zinc alloy + plastic* Color: black* Maximum voltage: V=5V* Maximum current: A=200mA* Support system Windows XP / 7 / 8 / 10 +, Macintosh OS X10.5+, Linux 2.4. ..