1)Environmental protection design. 2)Never needs the battery. 3)Does not have to replace the light bulb. 4)Environmental protection. Using the Faraday principle in electromagnetic force theory, transfers the mechanical energy the electrical energy, not only saves the energy, moreover has not replaced the battery and the battery has abandoned the pollution environment shortcoming. 5)Shines the component with the LED achievement, has the long life, the high brightness merit. caution 1)Never keep it close to household appliances or other articles which need to be shielded from need to be shielded from magnetism. 2)We will not take the responsibility for any loss caused by improper use.