1. Material: aluminum alloy shell, tinned copper wire core 2. USB interface: 5Gbps (USB3.0)/480Mbps (USB2.0) transmission rate, can be connected to external U disk, mobile hard disk card reader, keyboard and mouse, etc. 3. Type-C interface: can be used for PD100W fast charge 4. SD/TF card slot: cannot be read at the same time 5. HDMI interface: support 4K high-definition output 6. VGA interface: 1080P HD 7. RJ45 network port: adaptive 10M/100Mbps Ethernet 8. Size: about 15x5x2cm