Features: 1.Mini size, compact, easy to store and carry. 2.Nickel plating process, resistance to plugging, oxidation resistance. 3.Wear-resistant, heat-resistant, all aluminum alloy cover, strong and durable. 4.Multi-functional and practical, the TF/SD card can become a mobile phone and computer dual use U disk. 5.It can be used for type-c interface, tablet, PC, laptop and other digital devices that support OTG function /USB interface. specification: Mini size, compact, easy to store and carry. Nickel plating process, resistance to plugging, oxidation resistance. Wear-resistant, heat-resistant, all aluminum alloy cover, strong and durable. Multi-functional and practical, the TF/SD card can become a mobile phone and computer dual use U disk. It can be used for type-c interface, tablet, PC, laptop and other digital devices that support OTG function /USB interface. : Material: aluminium alloy + nickel plating Color: gold, blue, gray (optional) Size: approx. 69*22*9mm/2.7*0.9*0.4in Weight: Approx. 21.9g Transmission speed: 480Mbps Ports: SD/F, TF/F, USB3.0/M, Type-C/M Package List: 1 x Card Reader