Incredible new bright LED dynamo lantern which never needs batteries and uses a 3.6v NI-MH Storage Battery. This lantern can also be charged using a 6V external electrical adapter as well. This product can charge a cell phone and has a USB tie which can charge an MP3 player. The energy stored is used to supply the LED Lights, FM Radio, and Siren. It also has a compass attached and is a perfect emergency or camping item and makes a great gift! The FM tuner comes with a loudspeaker or earphone output and adjustable volume. Three minutes of cranking provides 2-8 minutes of mobile phone talk time, 10-20 minutes of MP3 use, or 4-10 minutes of MP4 use.