The Electric Optics AAA Sound Activated Battery Pack is ideal for club and venue outings, and powers up to 8 feet of wire. It is small, lightweight, and has a mode that dances to the music. Need we say more? OK, we will. This inverter is perfect for multiple uses. Since AAA batteries are so common, they can be used many times with little cost. For an even more "green" alternative, try our Rechargeable AAA Batteries and Charger. This lets you power your EL Wire for years for pennies.