Sign comes with a hanging chain and USB lead - NO PLUG
The lead also has an on / off switch
Powered by USB (simply insert into a standard adapter to power from mains electricity)
This Sign can be run from a PC or Laptop or plugged into a USB point on a wall socket or you can easily buy a USB plug on eBay.
I am a trusted UK based seller.
If you have any questions please do not hesitate to contact me.