Travel Emergency Disaster Dynamo Radio W FM, WB Radio, Cell Charger, Light & Alarm Siren Environmentalyy safe design uses a hand crank and a NI-MH battery. One minute of hand cranking should generate 30 minutes of light. Built-in FM/WB radio, built-in light, cell phone charger, and alarm. Comes with a built-in handle and weather strap. Batteries not needed. Never needs a replacement bulb. Great for emergencies, camping, household repairs, and more...