TP-LINK TL-WR941ND v1.0

Overview
There are multiple revisions of this device. The Flash amount seems to be the principal difference between the versions.

The TL-WR941N is identical to the TL-WR941ND aside from the antenna configuration. The TL-WR941ND has RP-SMA connectors for the 3 antennas. The TL-WR941N has integral antennas.

Links of Interest
On the OpenWrt wiki (serial pinout, pictures, etc)