The production of the most suitable illuminace of 300 Lux for reading. - There are two types of model; AAA-battery type and Lithium polymer type (rechargeable) with an excellent economical efficiency. - It is designed for mobile generation with a secure grip and excellent feel and ultra light weight that maximizes portability. - You can take your Lime Light any place in its travel pouch. - Three colors - Noble White, Ocean Blue and Gold Pink - offer a broad range of choice to match your mood or fashion. - Three energy sources provide excellent mobility and economical efficiency. (AAA battery , PC(connected to USB), Lighting up with cell phone) - One-body type cable of USB/24 pin cable (included in basic package) enhances portability for travel or emergency use.