I searched for the Surface Pro 3 USB 3.0 Hub with Ethernet. Since there is quite a lot. However, very few with optimal external power supply, which was crucial for me because I have to operate and external DVD / Blu-ray burner. This hub works perfectly without power supply, if you use the mouse, USB flash drives and Ethernet simultaneously. Even an external hard drive is still without power supply, as long as you the Hub via USB 3.0 (more power) connects to the PC. When Ethernet chip AX88179 ASIX I was skeptical at first. However, the tests were more than satisfactory. The transfer of large files to run almost 100% utilization (ca. 970-980 Mbit / s). So highly recommended. The box is a bit bigger than the other available passive USB 3.0 hubs with Ethernet (oblong shape) but still quite compact (about like a cigarette just not quite as thick).