JYtrend (TM) Sound Activated Neon Glowing Strobing Electroluminescent Wire /El Wire (Green 10ft) Neon Electroluminescent (EL) Wire (Diameter: 2.3mm) EL Wire activated by the sound countroller picking up the sound Sound sensitivity slide for sound pickup Great for Parties, Raves, Costumes & Decorations Requires 2 "AAA" Batteries (not included)