1, do not need to adopt the battery , environmental protection energy-conservation;
2, adopt the exquisite mechanical structure and high-efficient miniature generator ;
3, it can make built-in LED on over 10 o'clock continuously of 10MM one second to generate electricity each time;
4, adopt and import ultra and bright LED and do the light source , energy-efficient;
5, the life-span of light source is in above 100,000 hours