Specifications: The size same as credit card and no wire needs. It is very convenient because it can place inside the wallet. 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. Item Name: LED Card Light Material: ABS Light Color(Optional): White Light, Yellow Light Power Source:1 x CR1220 Battery (Included) Features: Ultra-thin, Portable, Mini, Gift Dimension: 8.6cm x 5.3cm/3.39" x 2.09" (Approx.) Notes: You will find more amazing products if you visit our store. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package Includes: 1 x LED Card Light