Principles of built-in micro-generators, batteries, power generated pinching plate to drive a small generator to provide lighting. Very wonderful and affordable baby. Very useful little thing, shape is Q, manual power, light and compact, plastic enclosure, clean up is easy. Brush at night to go home, to use it to illuminate the cell door open, on a whirlwind can not find the keyhole without it! Walking in the dimly lit road, with pig light, do not be afraid! ! Pig right hand pressing plate can be manually power generation, power full Oh, be careful to be way until! ! Generation is completed, pressing close to them can easily stand on the bag, do not account for a little place!