Solar Safety Helmet Description: Solar fan caps are solar powered by one built-in panel and fan, breezing people for cool. Customers` Logo can be imprinted on the front of cap. Features: 1) No battery needed,solar power,environmental friendly;New power source; 2) Different materials and colors available, cotton twill or polyester or bamboo with different colors; 3) an speed automatic change with the intensity of the sunlight with switch ON/OFF control 4) Can be with switch or without switch, novel design with battery cabin for indoor cooling.