The Goal Zero Nomad 7 Solar Panel delivers an ultra-compact yet powerful solar panel that enables you to charge your handheld devices directly from its USB and 12 Volt DC charging ports. The Nomad 7 solar panel delivers an ultra-compact yet powerful solar panel that enables you to charge your handheld devices from its USB and 12 volt DC charging ports. The Rock Out pumps sound from your iPod, mp3 and other audio devices through its integrated speakers. Has built in internal battery so it won't drain your device. It will pump out the tunes for 20+ hours before needing a recharge. This kit combines the two in perfect harmony. Plug the Rock Out into the Nomad 7 and recharge it from the sun in 4 hours. The Nomad is 30% smaller than comparable panels and 14 times more powerful than closest competitor. Use with a Guide 10 to power your devices when solar is not available.