Work your smartphone 24-7. Your old phones are ready to serve with this powershot. Features: -Instant power to your iPhone, Android, or MP3 player. -Converts 4 AA batteries into USB power without waiting. -Use your iPhone cord to connect to this USB power rank. -Plug and talk - no waiting time . -Low tech solution to a hitech problems. -Dimensions: 2.5"-3" H x 3.55"-4" W x 0.79"-1" D.