This magically infused token allows the holder to infuse Inspiration in to the token to be drawn upon when needed.   

Gain Inspiration.  As a reaction, the holder can expend (1) charge from the token to grant themselves inspiration.

To recharge the token, the holder must give up their Inspiration to store it in the token, regaining (1) charge.  The token has a maximum of (2) charges. 

 Player's Handbook (reference)
Inspiration.  If you have inspiration, you can expend it when you make an attack roll, saving throw, or ability check. Spending your inspiration gives you advantage on that roll.