The Electric Optics Mini Battery Pack is our smallest EL Wire inverter. This thing is TINY! It can easily be hidden inside a hat, or even inside the tongue of a shoe without much effort at all. This inverter will power up to 1 Foot of Electric Optics EL Wire and is small enough to be covered entirely by your hand when your palm is closed. Takes 2 AG13 Batteries (Not included), and has a toggle to switch from On/Off to Blink mode.