USD$ 3.66 (Dropshippers can also enjoy wholesale prices.)
The size same as credit card and no wire needs. It is very convenient because it can place inside the wallet. A such small card may use for illumination, design is so funny. 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!!!