HB20 Mindful 2-in-1 USB2.0 / USB3.0 card reader, support TF/SD card, wide compatibility1. Material: ABS.2. Sizes: 69*19*13mm. Weight: 10g.3. USB2.0 / USB3.0.4. Theoretical transmission speed: 480Mbps (USB2.0), 5Gbps (USB3.0).5. Theoretical support capacity: 2TB.6. Support TF/SD card.7. Compatible with most operating systems, such as for Windows and for Mac OS.