There are many like this but I use this one since I can tap off the USB port for power.
I recently purchased a TX-L37E5B smart TV and my problem is that the specified wireless LAN adapter (TY-WL20E) doesn't appear to be in stock either with Panasonic or at any of their retailers.......anywhere in the UK.
Panasonic Customer Service are worse than useless and I'm beginning to regret ever buying the bloody thing!
Do you know what an OLED TV is?
CNET explains how OLED technology differs from regular TVs, and what you need to know to make the right shopping decision.