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Micro USB 2.0 to Ethernet RJ45 Network Lan Adapter For Android (Developers Only)
Connectors: Micro-USB 2.0 Male, RJ-45 Female
Ethernet speed: 10/100 Mbps
OS Compatibility: Windows 10, 8.1, 8, 7, Vista, XP; Linux
Cable Length: 15cm
Chipset: QF9700

This Micro-USB Ethernet adapter works with Windows and select Android devices.

Windows users:
This device works well, but you may need to go into device manager and update the driver.

Android Users:
Depending on the firmware, compatibility can be hit or miss; therefore this product should only be used by developers and advanced users. On Android it will only work with select devices, as most devices do not have Ethernet support built in or do not have driver support for the QF9700 chipset. Generally it will work well with HDMI Android TV sticks. It will also work with some tablets and with devices that have Cyanogenmod. It will not work with the stock firmware on most phones and Android tablets.

These android devices are reported to work:
Dell Venue 9 Pro
Nokia N900
Cyanogenmod
Motorola Xoon
Moto X
Nexus 5
Nexus 7

An xdadevelopers community member has made a driver for the Galaxy Tab 3 10.1
http://forum.xda-developers.com/showthread.php?t=2705323
The same technique could be used to compile drivers for other Android devices.