The adapter has a glossy, translucent finish and its size is roughly that of a USB flash drive. The cap can't be attached to the back of the adapter so it could easily be lost.
Flipping the product over, we can see a sticker that lists out the MAC address and serial number. Standard fare, this is.
The side of the adapter has a WPS button which makes setup easy if you use WPS on your network. This is is nice addition by Patriot.