Goal Zero 19004 Nomad 7 / Rockout Combo Kit includes the GOAL ZERO Nomad 7 Solar Panel and Rockout Speakers The Nomad 7 is a Mono-crystalline Solar panel with USB and 12V DC outputs The Rockout Speakers deliver high quality sound from your phone or MP3 player for up to 20 hours Protect your device in the Nomad 7 or Rockout Speaker pockets. Use the USB port to charge the Rock-Out's rechargeable battery from the Nomad 7 or any USB output; know when the Rock-Out is on or receiving a charge by way of the power indicator