1. Shell material: aluminum alloy, plug material: ABS plastic 2. Number of interfaces: 12 3. 4K HD video output 4. Support PD fast charge mode 5. VGA: 1080p@60hz 6. Independent 3.5mm audio output 7. USBx3: transfer rate 5Gbps 8. HDMI*2: UHD, support 4K x 2K 9. SD card single drive letter: transfer rate 480Mbps 10. TF card single drive letter: transmission rate 480Mbps 11. CARDREAD: SD/TF support 512G 12. RJ45 network port: support gigabit network, stable performance 13. The high data transmission rate can reach USB3.1 5Gbps 14. AV3.5: Microphone can be connected, support voice, headset 15. Support high-definition same-screen/split-screen expansion to achieve multitasking 16. Interface type: HDMI*2/type-c*2/RJ45(1000M)x1/AVx1/USB3.0*2/TFx1/SDx1 17. Use: support all models with TYPE C and Thunderbolt 3 series notebooks and MAC BOOK with type c notebooks 18. Input port PD interface: USB3.1 type c interface, 20V@3A, Support max 87W power adapter 19. Dimensions: 275x80x17.2mm 20. Weight: 300g