Trivia Question

Trivia Question for the day:  What is this and what does it do?  (Hint:  that is my hotel keycard sticking out of the top)

 

Answer:  As those of you that have traveled in the region know, this controls the electricity.  When you are in the room, you insert the card for electricity.  When you are away from the room, it conserves electricity...but makes it hard to charge laptops and phones!