Award winning technology gives us the EyeMax LED Radio which is totally self sufficient using either solar or wind-up power. A built-in Ni-MH rechargeable battery can also be fully charged with the AC/DC adaptor, also included. No replacement batteries or bulbs are ever required. A 1-minute crank provides 1-hour of AM/FM Radio time which also includes National Weather Service broadcasts. The EyeMax can be wound more at any time for as much play time as you want. In direct sunlight the EyeMax will charge itself and play continuously. The internal Ni-MH battery can be fully charged from either the solar panel or the external charging adapter. A built-in 100,000 hour ultra-white bright LED light provides everyday or emergency use. When fully charged, the radio or flashlight will run for around 25 hours. A great conversation piece to teach your kids about the value of green energy. The crystal clear casing clearly demonstrates how their own energy can provide entertainment, information, and light. 4 1/2" high x 7 1/4" long x 2.5" wide. Freeplay™ self-sufficient products are high quality, reliable, accessible, and environmentally friendly. In 2007, Freeplay™ was internationally recognized as a "Brand with a Conscience" for "contribution to the betterment of the society by sustainable, socially responsible and humanistic behavior" by the global branding and business think tank, the Medinge Group. Since the first wind-up radio was produced 1996 (originally proposed to help stop the spread of AIDS in Africa through better education via radio) the Freeplay™ story has been one of pioneering and developing technology to serve the needs of people from all walks of life.