Charge the offGRID™ in a wall outlet for the 2-Port, or a USB drive for the 1-Port battery to stay charged before you head on the road. The offGRID™ comes in 1- and 2-Port options, allowing you to charge up to two devices at a time. Simply use the included Apple Sync cable or Micro USB cable to keep your devices charged at all times. Small enough to fit in the palm of your hand, the offGRID™ is the epitome of portable power. Use the offGRID™ for emergency power or to keep your iPod or iPhone at full charge..