1. Material: aluminum alloy 2. Output interface: 4K HDMI+3xUSB2.0+3.5mm audio out+SD/TF card slot 3. USB2.0 interface: 480Mbps transfer rate 4. SD/TF card slot: can read and write SD card and TF card at the same time, 5Gbps rate 5. For Surface Pro GO 6. Dimensions: 97x36x12mm
