Esky 10ft Portable Water Resistant Neon Glowing Strobing Electroluminescent Wires (El Wire) for Parties and Festivals, with Battery Pack, Many Color Options (Blue) 10 feet of 2.3mm EL wire Battery pack controller with off/on switch and strobe mode Great for rave parties, displays, and costume decorating Note: Requires 2 AA batteries for use. Batteries not included.