This is a very creative Pocket Light by Harc Lee:
“Sharing the blissful moments with your beloved.
In unexpected situations even a little lamp can be moving.
Just a card from your wallet sends out a beautiful, mellow light,
with a cell at its back providing power.
The use of the Back Light Unit makes its brighter even.”
It is very convenient since you can slip it like a card into your wallet, and flip it on and place it on a flat surface when you need it.