Sun King Boom, is the first ever solar-powered lantern with a Radio, MP3 player and Mobile Phone Charging from Sun King. A first in our Entertainment category. The digital FM Radio has internal memory to save your favorite radio stations. You can play music directly from an SD card or USB drive for up to 10 hours. Boom is full of options: Mute, Pause, standby or plug in your earphones for personal listening. This outstanding product does more than light your adventure.