The size same as credit card and no wire needs LED Pocket Light 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!
BUY IT NOW!
http://www.cross-mark.com/doulex-mini-card-pocket-lights-p-1816.html
http://www.facebook.com/pages/Cross-Mark-Co/153966148000019