Size is approx. 3.9 x 3.9 x 0.8 cm
Turn the upper part counterclockwise and this part of the main body will pop out.
Also can be stored by turning the upper part clockwise and push it in.
You can attach it to the back of your smartphone to hold your phone or use it as a stand.
JPY 
Euros
British Pounds
Australia Dollars
US Dollars
Canada Dollars
Singapore Dollar
Malaysian Ringgit
Hong Kong Dollar
