tp-link 150Mbps Wireless N Nano USB Adapter
model TL-WN725N
The Smallest 150Mbps Wi-Fi Adapter
Nano Design
USB 2.0
System Compatibility
support operating system include Windows (10/8.1/8/7/xp/Vista,Linux (Kernel 2.6 18-3.19.3) and Mac OS X 10.6 – 10.1
size is 18.6mm The Tiny Wi-Fi Wonder.