The interior has a LED light bulb, when you need to illuminate, you just fold "Light Bulb" up then the light turns on. If put " light Bulb" down, then the light turns off. You can use it anytime and anywhere!!!
Credit Card Size 86*53*3mm
no wire needs, convenient.
Fold "LED Light Bulb" up, light turns on
Can place in Wallets
Use 3V Battery (included)