Features:
4K HDMI-compatible Output: Support max 3840*2160/30Hz resolution
2 Port USB 3.0: Up to 5Gbps data transmission rate
SD/TF Card Slots: Support SD/TF cards reading at the same time, up to 100M/s
This USB Hub is not for charging.It is for data reader.
Compatible: Only compatible with Surface Pro 4/5/6, not suitable for any other models

Specifications:
USB: USB3.0/2.0/1.0
Support: SD/SDHC/SDXC/Micro SD
Compatible system: Windows XP/7/8/10
Voltage: 5V 9V 14.5V 20.3V
Input interface: USB3.0, mini DP
Output Interface: 2*USB3.0, 1*HDMI, 1*SD/Micro
Size: 91.5*32*11.5mm

Pacakge include:
1* USB HUB Docking Station

If there is any questions, just contact us, we will alway be here for you.